explain xkcd - User contributions [en]

1488: Flowcharts

2024-07-03T01:47:59Z

McMooseElk: /* Trivia */

{{distinguish|518: Flow Charts|1195: Flowchart}}
{{comic
| number = 1488
| date = February 18, 2015
| title = Flowcharts
| image = flowcharts.png
| titletext = Whoa, and if you overlay a Fibonacci spiral on a golden spiral it matches up almost perfectly!
}}
*The comic is a link to [https://xkcd.com/spiral/].
*The arrow at the bottom of this comic points to the "Random" button at the bottom of the xkcd page.

==Explanation==
'''Note''': A flawed version of this comic was posted at first and then quickly a correct version was uploaded. But this gave rise to several misunderstandings and confusion. See the [[#Trivia|Trivia]] section below.

This comic is a {{w|flowchart}} style, like many [[Category:Flowcharts|other comics]]. Interestingly, the first option, ''Do you like flowcharts?'' loops back to itself if you say ''Yes''. As the yes lines of other options point to the type of graph they describe (for example, the yes line of ''Do you like line graphs?'' points to a line graph), this may be interpreted as a recursive reference to the flowchart itself, although it points to the option itself rather than the ''START'' node. Also, this may cause the reader who actually likes flow charts to go into an endless loop of choosing ''Yes'', until they are so annoyed by flowcharts that they do not like them anymore and can progress by saying ''No''.

After asking about flowcharts, the reader is asked whether they like {{w|line graph|line graphs}}. If they follow the yes line, it becomes a line graph where "Time" is the x-axis and "Your Happiness" is the y-axis, and shows that your happiness increases with time. If you don't like line graphs, they are asked the same question about {{w|scatter plots}} where again the lines turn into the points and the axis of such a plot.

Taking yet another line, the reader is asked "Charge a battery?" If they follow the line marked yes they are asked whether they are {{w|Alternating current|A/C}} or {{w|Direct current|D/C}} current and are led to a portion of the flowchart which resembles a {{w|circuit diagram}} of a {{w|rectifier bridge}} with a battery connected to it.

If the reader follows the "no" line, they are asked if they like spirals. If they choose "no" they are asked whether they would take the {{w|path of least resistance}}. This part of the flowchart resembles a circuit diagram, and the word "{{w|resistance}}" is a pun because resistance can have several meanings. In electricity it is an electrical quantity that measures how the device or material impedes the electric current flow through it. Going left is the "Never" option, which goes through extra resistors and a diode, therefore making the "Yes" option the "path of least resistance". However, when asked if you choose the path of least resistance and answers ''never'' it could also mean that you do not try to avoid a little trouble.

Whether they choose "Yes" or "No", they arrive at "Do you like when people find the golden spiral in random images?" If they choose "yes" the line fades into a drawing of a golden spiral, and we see that the flowchart is structured around it. If they choose "no" they are asked if they are tired of flowcharts. If not, they are taken to the beginning to start over again. If they are tired, the line points to the "random" button on the xkcd website.

The title text and the faint image of a {{w|golden spiral}} parody the fact that the golden spiral is superimposed on nearly ''everything''. The golden spiral is a spiral that has the growth rate of the golden ratio, a number that has inspired both artists and mathematicians alike. However, people try to find the golden ratio in seemingly random objects, and they fall to confirmation bias when drawing a golden spiral on top that seemingly fits. The comic links to [https://xkcd.com/spiral/], where one can see exactly that- golden spirals Randall "found" in random photographs. This may be a spoof of the viral video [https://www.youtube.com/watch?v=yPCkcKNUVoo Illuminati Confirmed]. The limit of the ratio of two consecutive terms of the Fibonacci sequence is equal to the golden ratio, so a Fibonacci spiral match up almost perfectly for a good reason, unlike the coincidental matchings of the pictures in the mobile site link.

This comic bears reminiscence of [[730: Circuit Diagram]], although it is not exactly the same idea. Putting a golden spiral over other things was again used in [[2322: ISO Paper Size Golden Spiral]], like the [https://xkcd.com/spiral/ spiral] page on xkcd which this comic is a link to.

===List of Items in Flowchart===
{| class="wikitable"
|-
! Text in boxes
! Explanation
! Successor(s)
! Predecessor(s)
|-
| Start
| Start here
| Do you like flowcharts?
| Tired of flowcharts yet?
|-
| Do you like flowcharts?
| Asking whether or not the reader likes flow charts. Recursively returns to itself until the reader is annoyed enough to not like flowcharts and can move on to the next point.
| Do you like flowcharts?, Do you like line graphs?
| Start, Do you like flowcharts?
|-
| Do you like line graphs?
| It asks if you like {{w|line graph|line graphs}}
| Line or axis? [The one after yes to line graphs], Scatter plots?
| Do you like flowcharts?
|-
| Line or axis? [The one after yes to line graphs]
| It is asking if you wish to be the Line or the axis. If you choose the line, the flow chart line turns into a line graph with a positive curve. The same question will be asked later if you say no to line graphs and yes to scatter plots.
| [A line in a line graph], Time or your happiness?
| Do you like line graphs?
|-
| Time or your happiness?
| If you choose ''time'' the flow chart line becomes the x-axis of time and if you choose ''your happiness'' it becomes the y-axis in the line graph with the line from before indicating that your happiness increases over time (maybe because you like line graphs and are now becoming part of one?)
| [Time axis], [Your Happiness axis]
| Data or axis? [The one after yes to line graphs]
|-
| Scatter plots?
| If you don't like line graphs then maybe you like {{w|scatterplot|scatter plots}}?
| Data or axis? [The one after yes to scatter plots], Help charge a battery?
| Do you like line graphs?
|-
| Data or axis? [The one after yes to scatter plots]
| It is asking if you wish to be the data or the axis. If you choose the data, the flow chart line turns into a scatter plot that is also a flowchart where each of the 10 flow chart boxes is black with two white arrow, one pointing up and the other to the right. They are all connected with multiple connections. The same question was asked earlier if you said yes to line graphs.
| [A flow chart that looks like points in a scatter plot], X of Y?
| Scatter plots?
|-
| X or Y?
| Which axis do you prefer? The line you chooses turns in to this axis in the scatter plot.
| [X axis], [Y axis]
| Data or axis? [The one after yes to scatter plots]
|-
| Help charge a battery?
| From here on the flowchart is at the beginning of morphing into a circuit diagram.
| Like spirals?, Are you A/C or D/C?
| Scatter plots?
|-
| Are you A/C or D/C?,
| Asks whether you are an {{w|AC current}} or a {{w|DC current}}.
| Positive or negative phase?, positive or negative DC terminal?
| Help charging a battery?
|-
| Positive or negative phase?
| Conventional current will flow forwards during the positive phase of AC current, whereas in the negative phase the forwards directions matches the actual flow of electrons (see [[567: Urgent Mission]]).
| Positive or negative DC terminal? [To either side of this box]
| Are you A/C or D/C?
|-
| Positive or negative DC terminal?
| This box looks like a {{w|rectifier bridge}}, which is used to convert AC to DC. The single output leads to a battery which is joined in a circuit to the bottom of the rectifier bridge.
| Battery [plus or minus]
| Positive or negative phase?
|-
| Like spirals?
| Well, do you? If you do you instantly go to the question of golden spirals. If not, you take a detour.
| Take the path of least resistance?, Do you like when people find the golden spiral in random images?
| Help charge a battery?
|-
| Take the path of least resistance?
| This one is a pun. If resistance is seen as electrical resistance, then the bottom one labeled ''yes'' is the one with least resistance. The other labeled "Never" sends you through ''more'' resistance, and a 'protective' diode. But in either case you are lead to the same decision box. Also the resistors could look like spirals - making this detour for those who dislike these even more painful.
| Do you like when people find the golden spiral in random images?
| Like spirals?
|-
| Do you like when people find the golden spiral in random images?
| Here is a question regarding if you like the idea that some people can find and superimpose a {{w|golden spiral}} on a random image. No matter which options you choose you are forced to admit that it is totally BS ({{w|bullshit}}). But maybe you like it anyway? If you choose the ''Yes, even though it's total BS'' option the flow chart continues to the side of the chart, then starts to spiral up only to fades out to a very faint golden spiral aligned to the other items in the flow chart. It is almost impossible to see it before you follow this line. The other option is of course ''No, it's total BS''. If you do like it, then click on the [https://www.xkcd.com/1488/ comic on xkcd].
| Tired of flowcharts yet?, [A very faint golden spiral]
| Like spirals?, Take the path of least resistance?
|-
| Tired of flowcharts yet?
| Have you had enough of flow chart? If not, then you are returned to the ''start'' box at the top of the chart. Maybe you have not tried all options yet, although you have already answered that you are tired of flow charts if you get this far. If you have had enough and answers ''Yes, I want to look at something else'' this option leads to the random comic button below the comic (only on xkcd). This decision ''literally'' breaks the fourth wall in traveling through the image's nominal boundary to point at a specific button to look at some other comic.
| Start, [The xkcd [https://c.xkcd.com/random/comic/ Random] comic button]
| Do you like when people find the golden spiral in random images?
|}

==Transcript==
:[A flow chart. The first option the start box is white text on a black rectangle. The other boxes are rhombuses standing on edge. Except for the first there are always two options going out. Most only have one option coming in, but there are exceptions with two options going in.]
:Start
:[One arrow points to the first real choice.]
:[Below the text on the two options going out from each option will be indented. The top of these two options will be the one to be mentioned first below. Then the chart will be mapped like this going back to the previous unfinished option.]
:Do you like flowcharts?
::Yes
::No
:[Yes goes back where it came from.]
:Do you like line graphs?
::Yes
::No
:Line or axis?
::Line
::Axis
:[The line is just a line – but now as the line in a line graph.]
:Time or your happiness?
::Time
::Your happiness
:[These two lines turn into the x and y axis of the line graph.]
:Scatter plots?
::Yes
::No
:Data or axis?
::Data
::Axis
:[The data line turns into the points in a scatter plot.]
:X or Y?
::X
::Y
:[These two lines turn into the x and y axis of the scatter plot.]
:Help charge a battery?
::Yes
::No
:Are you A/C or D/C?,
::A/C
::D/C
:Positive or negative phase?
::+
::-
:[The D/C option also goes to this next option, but directly. This next rhombus looks like a part of a circuit diagram.]
:Positive or negative DC terminal?
::+
::-
:[These two lines goes to the + and – poles of a battery.]
:Like spirals?
::No
::Yes
:Take the path of least resistance?
::Never
::Yes
:[Never goes through two resistors and a diode before reaching the point of the Yes option, which then also goes though yet another resistor. Both thus end at the same option, which is also the one that Yes to like Spirals ends up at:]
:Do you like when people find the golden spiral in random images?
::Yes, even though it's total BS.
::No, it's total BS.
:[Yes option takes the chart into a fading line that turns into a golden spiral spanning the whole chart.]
:Tired of flowcharts yet?
::No
::Yes, I want to look at something else
:[No takes you back to the start box at the top.]
:[Yes takes you out of the comic and points to the Random button at xkcd.]

==Trivia==
*A corrected version of the comic was uploaded later on the same day.
**This is the second time in February 2015 this has occurred; previously with [[1482: NowPlaying]].
*It appears that an unfinished version of the comic was uploaded, with several of the lines and labels missing, and the bridge circuit incorrectly drawn.
*This [[Media:OriginalFlowcharts.png|original]] comic can be seen on the link.
*The errors were:
**Missing yes/no at the line graph options.
**The diamond that points to the line in the line graph originally says "Data or axis?"
**Missing yes/no at the scatter plot options and missing the line for the yes option going to the second Data axis.
**Missing yes at charge a battery options.
**Missing DC from the AC or DC options and missing the line for the DC option going to the terminal.
**Missing the arrow pointing to the terminal from the "-" option of the phase.
**Missing +/- at terminal option and missing the line going from the negative pole of the battery to the terminal.
**The terminal, which is a rectifier bridge, had both diodes drawn in the wrong direction on the left side of the decision box.
**There was a + floating between the phase and terminal option. This was deleted.
**Missing yes at the spiral options.
**Missing yes/never! at the least resistance options. Also the arrow pointing to the next option was missing.
*The comic has reference to charging a battery, and was posted on the 270th birthday of Alessandro Volta, the original creator of the battery. This could, however, have been a coincidence.
*Later after the initial release of this comic Randall added a link to this page. It's viewable in the HTML-source or here: [https://xkcd.com/1488/info.0.json https://xkcd.com/1488/info.0.json]. The text is: ''"This is a gods-damned flowchart, huge surprise. a transcription and explanation and other things available on an external site http:\n\nwww.explainxkcd.com\nwiki\nindex.php\n1488 ]]\nhttp:\n\nwww.explainxkcd.com\nwiki\nindex.php\n1488"''.

{{comic discussion}}

[[Category:Comics sharing name|Flowcharts03]]
[[Category:Flowcharts]]
[[Category:Scatter plots]]
[[Category:Line graphs]]
[[Category:Puns]]

1759: British Map

2024-07-03T01:34:46Z

McMooseElk: Added extra details on the dashed line

{{comic
| number = 1759
| date = November 14, 2016
| title = British Map
| image = british_map.png
| titletext = West Norsussex is east of East Norwessex, but they're both far north of Middlesex and West Norwex.
}}

==Explanation==
This comic is a joke similar to [https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8&safe=active&ssui=on#q=how%20americans%20see%20the%20world&safe=active&ssui=on "How Americans see the world"] showing how the average American has opinions on the world, often including jokes such as a lack of {{w|Africa}}, etc. This has been used before in [[850: World According to Americans]]. The map also plays with the joke by noting it has been labeled by [[Randall Munroe|a specific American]] rather than "Americans".

Many areas of the UK are most familiar to foreigners thanks to their depiction in various fantasy novels and TV series. This map labels some of these, as well as including many silly names that simply sound like real British towns to an American ear. A protractor is shown off the coast of the {{w|Mull of Kintyre}} in reference to the "{{w|Mull of Kintyre test}}" - according to urban legend, the angle of the Mull defines the maximum allowed erectness for a man on films and home video releases in the UK.

Randall previously posted [https://blog.xkcd.com/2015/11/24/a-puzzle-for-the-uk/ a map of Great Britain] on his blog as part of the promotion for his book ''[[What If? (book)|What If?]]''. This map is from a very similar position and appears to have been traced from the same source, although there are some slight differences. Both maps include a sketch of {{w|Lake Windermere}} with boats on it, and both have the locations of London, Oxford and Cambridge labeled (the blog map also shows Edinburgh and Bristol - in this comic, these are labelled Eavestroughs and Minas Tirith). Both also contain references to {{w|Stonehenge}} and {{w|Watership Down}}.

Note that in British English, the correct spelling of “labeled” is ‘labelled’.

The title text plays around with the concept of the compass directions and how numerous regions (such as South "Sussex" and West "Wessex") incorporate such literal names in their description. Randall is creating similar sounding names which are nonsense-ish ("Norsussex" would be the region of the Northern-Southern Saxons), and placing them in relation to each other in ways which would be geographically implausible, similar to this [http://www.netfunny.com/rhf/jokes/92q3/xx19.html old joke about Boston]. However, in Germany there exists the region called ''Westphalia'' (''Westfalen''), and the eastern part of it is often referred to as ''East-Westphalia'' (''{{w|Ostwestfalen}}''), which sounds somewhat ridiculous. Part of the joke in the title text could be the fact that while three of the locations are fictional, {{w|Middlesex}} does actually exist.

{| border =1 width=100% cellpadding=5 class="wikitable sortable"
!Label on the map !! Explanation !! Actual location !! Notes
|-
| Helcaraxë
|| The "[http://lotr.wikia.com/wiki/Helcarax%C3%AB Grinding Ice]", an area of {{w|Middle-Earth}}. Like Helcaraxë, northern Scotland is cold, mountainous and in many areas inhospitable.
|| The {{w|Grampian}} region
||
|-
| Blick
|| Possibly referencing {{w|Wick, Caithness}}, one of the northernmost towns in Great Britain. The real Wick is substantially further north, off the edge of the map.
||Near {{w|Rhynie, Aberdeenshire}}
|| This is the name of a goblin in the movie "Legend" starring Tim Curry. Could also reference the art supply store, Blick Art Materials
|-
| Everdeen
|| {{w|Katniss Everdeen}} is the heroine of ''{{w|The Hunger Games}}'' series of novels and films
|| {{w|Aberdeen}}
|| In colloquial Scots, its pronunciation is very similar to "Everdeen."
|-
| Highlands
|| {{w|Scottish Highlands|No joke}}
|| {{w|Scottish Lowlands}}
|| Maybe deliberate trolling - Scots have strong feelings about where the Highland-Lowland border is
|-
| Norther Sea
|| Pun on the {{w|North Sea}} - i.e. a sea that is further north (or 'norther') than the North Sea.
|| {{w|Sea of the Hebrides}}
||
|-
| Loch Lomond
|| {{w|Loch Lomond|No joke}}
|| Loch Lomond
|| Loch Lomond is the largest lake in Great Britain, and the third largest lake in the UK. It is the subject of a well-known {{w|The_Bonnie_Banks_o%27_Loch_Lomond|traditional song}}, and was referenced in the "beaming" (teleporter) bit in the movie Spaceballs by the Scotty expy 'Snotty'. It also houses a distillery producing a whisky appreciated by Captain Haddock in ''{{w|The Adventures of Tintin}}''. Thanks to the {{w|Loch Ness Monster|monster}}, {{w|Loch Ness}} is by far the most famous Scottish loch, so naming the second most famous subverts expectations.
|-
| Fjordham
|| {{w|Fjords}} are glacial valleys. "-ham" is a common English placename suffix from Old English, related to the modern {{w|Hamlet (place)|hamlet}} ''or'' another root, such as that relating to river meadows, but [http://keithbriggs.info/EPN_maps/ham.pdf not so common] in the more obviously glacier-carved areas such as this area in Scotland. There are several villages (in England) named {{w|Fordham}}
|| Near {{w|Oban}} on the {{w|Firth of Lorn}}
|| The Scottish word "Firth" is related to "Fjord", although Lorn is not a fjord in the strict scientific sense - it was formed along the {{w|Great Glen Fault}} by tectonics, rather than glaciers
|-
| Glassdoor
|| {{w|Glassdoor}} is a website where employees can review their employers
|| {{w|Stirling}}
|| Although it's shown near Stirling, the reference seems to be to {{w|Glasgow}}
|-
| Eavestroughs
|| A dialectal word for {{w|rain gutter}}
|| {{w|Edinburgh}}
||
|-
| Seasedge
|| Procan's realm in ''Dungeons & Dragons''. "Sea sedge" is also one of many common names used for ''{{w|Acorus calamus}}'', the calamus or sweet flag.
|| Somewhere near the Scotland-England border
||
|-
| Chough
|| A {{w|Chough|species of bird in the crow family}}
|| The {{w|Scottish Borders}}
||
|-
| Meowth
|| {{w|Meowth}} is a cat-like Pokémon. Name may allude to {{w|Howth}}.
|| {{w|Ayr}}
||
|-
| Glutenfree
|| {{w|Gluten-free}} food lacks the protein {{w|gluten}}. This allows {{w|coeliac disease}} sufferers to enjoy it, but has also become a dietary fad in itself.
|| {{w|Cairnryan}}, {{w|Dumfries and Galloway}}
||
|-
| Blighton
|| A mashup of {{w|Brighton}} and {{w|Blighty}} Or a reference to {{w|Enid Blyton}}, a noted UK children’s author.
|| The {{w|Scottish Borders}}
|| The real Brighton is much further south, on the south coast.
|-
| North Sea
|| {{w|North Sea|No joke}}
|| North Sea
||
|-
| Eyemouth
|| {{w|Eyemouth|No joke}}
|| near {{w|Newcastle-upon-Tyne}}
|| The real Eyemouth is further north, where "Seasedge" is marked on the map.
|-
| Earhand
|| A pun on Eyemouth
|| {{w|Carlisle}}
||
|-
| Hairskull
|| A pun on Eyemouth
|| {{w|Teesside}}
||
|-
| Belfast DeVoe
|| {{w|Belfast}}, capital of Northern Ireland, mashed up with the rock band {{w|Bell Biv DeVoe}}
|| {{w|Belfast}}
||
|-
| Lakebottom
|| The {{w|Lake District}}. "-bottom" is a common placename across Northern England, and refers to a town in a valley.
|| {{w|Lake District}}
|| Below Lakebottom is a sketch of a lake with yachts on it. This is illustrative and doesn't correspond to any of the actual lakes which would be barely visible on this map. There are 16 'lakes' in the Lake District, but only one ({{w|Bassenthwaite Lake}}) actually has 'lake' in its name.
|-
| Braintree
|| {{w|Braintree, Essex|Not a joke}}
|| {{w|North Yorkshire}}
|| The real Braintree is much further south, near where "Paulblart" is on the map. Also a possible reference to the [https://www.braintreepayments.com Braintree] online payments platform (widely advertised on podcasts), or a stop at the end of the Red Line in Boston.
|-
| Skinflower
|| A pun on Braintree
|| {{w|Yorkshire Dales}}
||
|-
| Bjork
|| {{w|Björk}} is an Icelandic singer
|| {{w|East Riding of Yorkshire}}
|| The reference is presumably to York (historically known as Jórvík), although it's a bit too far east.
|-
| Weedle
|| {{w|Weedle}} is a Pokémon
|| {{w|Forest of Bowland}}
|| In the original Pokémon Red and Blue games Weedle is most notably found in '{{w|Viridian Forest}}' which - like the real-life Forest of Bowland - is known for its diverse wildlife.
|-
| Eeugh
|| An expression of disgust
|| {{w|Kingston-upon-Hull}} (generally just "Hull")
|| Pronounced 'ull by locals
|-
| Crewneck
|| A shirt with a {{w|Crewneck|simple round collar}}.
|| {{w|Blackpool}}
|| There is a town called {{w|Crewe}} somewhat further south than shown in Cheshire.
|-
| Paisley
|| {{w|Paisley, Renfrewshire|No joke}}. It sounds funny to Americans because it's associated with {{w|Paisley (design)|paisley}} fabric, a Persian-style print invented in the town. Possibly a pun on {{w|Parsley|parsley}}, a herb.
|| {{w|Burnley}}
|| The real Paisley is in Scotland, near Glasgow.
|-
| Basil
|| Also {{w|Basil|a herb}}, and {{w|Basil Fawlty|one of the most famous British TV characters}}.
|| {{w|Scunthorpe}}
||
|-
| Aidenn
|| An apparent pun on the {{w|Scouse}} accent: {{w|h-dropping}} and {{w|th-stopping}} mean the common "hey, then" would be pronounced "ai denn".
|| {{w|Merseyside}}
||
|-
| Hillfolk
|| {{w|Hillfolk}} is an RPG. "-hill" (referring to, well, a hill) is common in British placenames, and "-folk" (referring to a tribe or culture) is seen in ''Suffolk'' and ''Norfolk''. Possibly also a reference to {{w|Hobbits}}, a race of little people that live under hills in The Lord of the Rings.
|| {{w|Manchester}}
|| Manchester's name does in fact reference hills: it means "castle on the {{w|breast-shaped hill}}"
|-
| Waterdown
|| To "water something down" is to weaken it. "-down" is common in British placenames and refers to {{w|Downland|chalk hills}}. Possibly a contraction from the book and movie: Watership Down.
|| Near {{w|Grimsby}}
||
|-
| Dubstep
|| {{w|Dubstep}} is a genre of electronic music with a heavy bass line.
|| {{w|Dublin}}
|| Dublin is the only non-UK settlement in the map, and one of two on the island of Ireland.
|-
| Borough-upon-Mappe
|| By being recorded here, this is literally a borough upon a map. The "-upon-" is a common element of placenames for towns on rivers, although there's no River Mappe. Possibly referencing the fact that the town is on a "mappe" (map)?
|| {{w|Lincolnshire Wolds}}
||
|-
| Fhqwhgads
|| "[http://www.hrwiki.org/wiki/Fhqwhgads Fhqwhgads]" is a joke from the Homestar Runner internet cartoon. In the cartoon, the main character read a fanmail that was signed only with a random keyboard mash of characters, which Strong Bad shortened to "Fhqwhgads," a name that became a running gag on the cartoon.
|| {{w|Wrexham}}
|| This is near the Welsh border; Welsh names often look like a mish-mash of consonants to English speakers ignorant of Welsh orthography; within a few miles of Wrexham are towns like {{w|Yr Wyddgrug}} ("Mold" in English), {{w|Cefn-y-bedd}}, {{w|Gwernymynydd}} and {{w|Llanarmon Dyffryn Ceiriog}}.
|-
| Cadbury
|| {{w|Cadbury}} is a British chocolate company.
|| Near {{w|Boston, Lincolnshire}}
|| Cadbury actually built a town for its workers... but it's called {{w|Bournville}}. There are several towns called {{w|Cadbury_(disambiguation)#Places|Cadbury}} in the UK (where the Cadbury family presumably got its name), but none are near here.
|-
| Cabinetry
|| The art of making {{w|cabinets}}.
|| Near {{w|Oswestry}}
||Several towns in the English Midlands have names ending in -try, including Oswestry. "Cabinetry" could be a pun on {{w|Coventry}}, which lies further to the east.
|-
| The Shire
|| {{w|Shire (Middle-earth)|The Shire}} is home to the {{w|Hobbits}} in {{w|Middle-Earth}}
|| {{w|Midlands}}
|| Tolkien drew inspiration for the Shire from the {{w|West Midlands (region)|West Midlands}}, although Tolkien was from the southern part of the Midlands (roughly where Dampshire is on the map).
An internet posting titled [http://www.snopes.com/politics/soapbox/revocation.asp "A Letter to the U.S" after the 2016 Presidential Election"], falsely attributed to John Cleese, could also have been inspiration for this map. It in particular says: "3. You should learn to distinguish English and Australian accents. It really isn't that hard. English accents are not limited to cockney, upper-class twit or Mancunian (Daphne in Frasier). Scottish dramas such as 'Taggart' will no longer be broadcast with subtitles.You must learn that there is no such place as Devonshire in England. The name of the county is "Devon." If you persist in calling it Devonshire, all American States will become "shires" e.g. Texasshire Floridashire, Louisianashire."
|-
| Landmouth
|| Literal description
|| {{w|The Wash}}
||
|-
| Brandon
|| {{w|Brandon#United Kingdom|Not a joke}}
|| {{w|The Fens}}
|| There are several Brandons in the UK, the nearest being where "Keebler" is on the map. The area shown is borderline-uninhabitable, as it is marshland and lies mostly below sea-level. Only a few farms and isolated hamlets exist here.
|-
| Hamwich
|| A ham sandwich. Both "-ham" and "-wich" are common generic placenames. The village called simply "Ham" and the other called "Sandwich" are fairly close to each other, with a famous roadsign that points to "Ham Sandwich" between them. The bread-slices-and-filling foodstuff is named for the 4th Earl of Sandwich, and hence ultimately from the town of the same name.
|| {{w|Norwich}}
|| Likely to be coincidence but the "Cheese Hamwich" is a breaded cheese and turkey food product sold by {{w|Bernard Matthews Ltd}} whose food processing facility is based not far from this map location.
|-
| West Norsussex
|| Mash-up of {{w|West Sussex}} ("South Saxons") with the obsolete {{w|Wessex}} ("West Saxons") and never extant {{w|Norsex}} ("North Saxons")
|| {{w|Midlands}}
||
|-
| Redsox
|| The {{w|Boston Red Sox}} are a baseball team
|| {{w|The Fens}}
|| The Boston Red Sox play at Fenway Park. The map location is not far from the British {{w|Boston, Lincolnshire|Boston}}
|-
| Keebler
|| The {{w|Keebler Elves}} advertise cookies in the US
|| {{w|Elveden}}
|| The name of this village in Thetford Forest means "valley of the elves".
|-
| Bloughshire
|| Most British counties have "-shire" in their name. Originally it meant they were administered by a {{w|sheriff}}. However, they are usually no longer known by those names in Wales.
|| {{w|Powys}}
||
|-
| Lionsgate
|| {{w|Lionsgate|A film studio}}
|| {{w|Leicester}}
|| The word/suffix "-gate" in placenames often refer to {{w|Harrogate|ancient streets or roads}}, or possibly such a way through a gap that is natural (e.g. {{w|Ramsgate}}'s cliffs) or in a city wall (which can thus be sealed, or 'gated'). There are no obvious inspirations for Lionsgate in that part of the country &emdash; ''Ram''sgate, in particular, is at the extreme eastern end of the southern edge of the UK.
|-
| Kingsbottom
|| Another "-bottom". A possible reference to {{w|King's Landing}}, the capital of the Seven Kingdoms of {{w|Westeros}} and one of its districts Fleabottom.
|| {{w|Suffolk Coast National Nature Reserve|Suffolk Coast}}
|| Possibly named for the town of {{w|King's Lynn}}, also located in East Anglia but close to its north coast.
|-
| Aberforth
|| {{w|Aberforth Dumbledore}} is {{w|Albus Dumbledore}}'s brother in the ''Harry Potter'' series. The name is sometimes translated as "from the river", but without any etymological references. "Aber" is Welsh for a "river mouth" or estuary, and is widespread in Wales, and occasionally found due to Celtic influence in other parts of the UK (such as {{w|Aberdeen}}).
|| {{w|Aberystwyth}}
|| {{w|Aberporth}} ("Mouth [of the] port" - the Welsh equivalent of the English name Portsmouth) is a real town located a little further southwest along the Welsh coast. {{w|Forth}} may be a reference to the {{w|Firth of Forth}} in Scotland, where "Firth" means estuary or fjord, and "Forth" is thought to mean "the open air". Aberforth would literally mean "the mouth of the river Forth", which is the location of {{w|Edinburgh}} in Scotland. Alternatively, "forth" in Welsh could be a soft mutated form of the Welsh name "{{w|Borth}}" (the name of a town - but not a river - a little further north along the coast), which is itself a soft mutated form of the word "porth" meaning port.
|-
| South Norwessex
|| Another mash-up of {{w|Sussex}} ("South Saxons") with the obsolete {{w|Wessex}} ("West Saxons") and never extant {{w|Norsex}} ("North Saxons"). Also southwest of West Norsussex.
|| {{w|Birmingham}}
||
|-
| Dryford
|| Would refer to a river crossing without water. "{{w|Ford (crossing)|-ford}}" is a common placename element.
|| {{w|Shropshire Hills}}
||
|-
| Frampton
|| There are many {{w|Frampton}}s in the UK. It means "town on the river Frome" - and there are also several {{w|River Frome}}s. The name is famous thanks to rock musician {{w|Peter Frampton}}
|| {{w|Bury St Edmunds}}
||see also "Southframpton"
|-
| Cambridge
|| {{w|Cambridge|No joke}}
|| {{w|Cambridge}}
|| Cambridge and Oxford, the two most prestigious university towns, are correctly marked. Together, they form {{w|Oxbridge}}
|-
| Kingsfriend
|| Possibly a joke about the royal patronage given to certain towns - for instance, {{w|Bognor Regis}} and {{w|Royal Wootton Bassett}}. Also {{w|Knighton, Powys|Knighton}} (a King's friend?) is very close to this locale, and so is {{w|Kington, Herefordshire|Kington}}.
|| Near the England-Wales border
||
|-
| Cair Paravel
|| {{w|Cair Paravel}} is the castle where the ruler of {{w|Narnia}} lives in the ''Narnia'' series.
|| {{w|Dedham Vale}}
||
|-
| Camelot
|| {{w|Camelot}} was (in legend) {{w|King Arthur}}'s court.
|| Near the England-Wales border
|| The King Arthur myth did in fact originate in the Welsh culture. However, most sites associated with Camelot, such as {{w|Winchester}}, {{w|Glastonbury}} and {{w|Cadbury Castle}}, are in England.
|-
| Nothingham
|| A pun on {{w|Nottingham}}, famous for {{w|Sherwood Forest}}, the legendary home of {{w|Robin Hood}}.
|| Near {{w|Northampton}}
||
|-
| Cumberbatch
|| A surname, best known as that of actor {{w|Benedict Cumberbatch}}.
|| {{w|Harlow}}
|| The surname of a famous actress is replaced with that of a famous actor
|-
| Dampshire
|| A pun on the county of {{w|Hampshire}}. Generically a joking reference to any county, particularly of the {{w|West Country}}, to imply it is particularly prone to rain.
|| Gloucestershire
||
|-
| The CW
|| {{w|The CW|An American TV channel}}.
|| {{w|Pembrokeshire}}
|| Presumably the placement is a reference to Welsh words such as "cwm" which use W as a vowel.
|-
| Whaling
|| The practice of hunting whales. May be a reference to other -ing towns like {{w|Reading, Berkshire|Reading}} (which is actually pronounced "redding", not "reeding"), and also to its location in Wales.
|| {{w|Merthyr Tydfil}}
||
|-
| Paulblart
|| ''{{w|Paul Blart: Mall Cop}}'' is a 2009 comedy film starring Kevin James
|| Near {{w|Chelmsford}}
|| Possibly a humorous contrast with Cumberbatch above, a highbrow British classical actor followed by a lowbrow American movie character.
|-
| Oxford
|| {{w|Oxford|No joke}}
|| {{w|Oxford}}
|| See Cambridge. Surprisingly, Randall made no attempt to troll readers by switching the locations of Cambridge and Oxford. Or he did, but ironically from the wrong 'correct' assumption!
|-
| Moorhen
|| The {{w|moorhen}} is a waterfowl.
|| {{w|Gower Peninsula}}
|| Possibly punning on nearby {{w|Swansea}}.
|-
| Cardigan
|| {{w|Cardigan, Ceredigion|No joke}} - it seems funny to Americans because of the {{w|Cardigan (sweater)|knitted sweater}} popularised by the {{w|James Brudenell, 7th Earl of Cardigan|Earl of Cardigan}}
|| {{w|Newport, Wales}}
|| The actual Cardigan is on the west coast. The name may be punning on the city of {{w|Cardiff}}, capital of Wales, which is further south-west.
|-
| BBC Channel 4
|| A composite of {{w|Channel 4}} and the {{w|BBC}} (UK TV operators) confusing the meaning of TV channel with a geographic channel. There ''is'' a {{w|BBC Four}} (digital TV channel) ''and'' a {{w|BBC Radio 4}} (FM and digital radio) with an {{w|BBC Radio 4 Extra|adoptive daughter-station}} (digital only, originally called BBC7), but none of these are ever really called "BBC Channel 4" by locals, and it is hard to say what detail 'an American' might ''think'' he knows.
|| {{w|Bristol Channel}}
||
|-
| London
|| By virtue of being the capital and largest city, as well as a famous {{w|world city}}, London is one of the few cities in Britain that anyone, no matter how ignorant of British geography, can manage to name correctly.
|| London
|| It is not unknown for foreigners ''and'' British alike (even some residents of London) to assume that London has a more central location in England (such as {{w|Midlands|'The Midlands'}}) or {{w|Britannia Inferior|even further towards the north}}. Randall seems to be more knowledgable than this.
|-
| GMT
|| A reference to {{w|Greenwich Mean Time}}. Shown on the map near the London bourough of Greenwich through which the GMT meridian passes.
|| {{w|Greenwich}} (roughly)
||
|-
| Corbyn
|| A reference to the leader (at the time of publication) of the UK {{w|Labour Party (UK)|Labour Party}} {{w|Jeremy Corbyn}}.
|| {{w|The Cotswolds}}
|| May be a confusion with the town of {{w|Corby}} although it is not near the location shown.
|-
| Tems-upon-Thames
|| A joke about the counter-intuitive pronunciation of {{w|Thames}}.
|| {{w|Rochester}}
||
|-
| Minas Tirith
|| {{w|Minas Tirith}} is the capital of Gondor in ''Lord of the Rings'' and is built on the side of a mountain.
|| {{w|Bristol}}
|| Clifton Village, in Bristol, is built on the side of the Avon Gorge so could be compared to {{w|Minas Tirith}}. Nearby {{w|Cheddar Gorge}} is famous for its steep cliffs that resemble the landscape from Lord of the Rings.
|-
| Hogsmeade
|| {{w|Hogsmeade}} is the nearest village to Hogwarts in the ''Harry Potter'' books.
|| {{w|Dover}}
|| The fictional Hogsmeade was in Scotland. Randall shows the {{w|Channel Tunnel}} running from there, a possible reference to Hogsmeade's secret connections to Hogwarts.
|-
| Tubemap
|| The {{w|Tube Map}} is the map of the {{w|London Underground}}, widely considered a masterpiece of design.
|| {{w|Outer London}}
||
|-
| Cambnewton
|| {{w|Cam Newton}} is quarterback for the {{w|Carolina Panthers}}. "Cam-" is common for placenames on any of the several British rivers called "{{w|Cam River|Cam}}", while "Newton" means "new town". Also possibly a pun on Camden Town, a touristic district in North London, although not its actual location on the map.
|| {{w|West Country}}
||
|-
| Efrafa
|| Efrafa is a rabbit warren in the story ''{{w|Watership Down}}''.
|| {{w|Chidden}}
|| According to the story, the warren is located roughly here - the real {{w|Watership Down, Hampshire|Watership Down}} is in Hampshire.
|-
| Chansey
|| {{w|Chansey|Another Pokémon}}. "-sey" is a common suffix meaning "island".
|| {{w|Dungeness (headland|Dungeness}}
||
|-
| Oughghough
|| Playing on common place name elements, "oughghough" has no clear pronunciation under the rules of English. It could be "Uff-guff", "Oo-gow", "Uh-guh" or any combination of these sounds. The name looks similar to the real {{w|Loughborough}} ("Luff-bruh")
|| {{w|Barnstaple}}
|| Legend has it that Loughborough was once pronounced 'Loogabarooga' by a visiting Australian.
|-
| Sundial
|| A {{w|sundial}} is a clock using a shadow to tell the time.
|| {{w|Wiltshire}}
|| The location roughly corresponds with {{w|Stonehenge}}, an ancient stone circle that was likely used to track the sun (though as a ritual calendar, rather than a clock)
|-
| Dobby
|| {{w|Magical_creatures_in_Harry_Potter#Dobby|Dobby}} is a character in {{w|Harry Potter}}.
|| {{w|Southampton}}
|| Similar to {{w|Derby}}.
|-
| Lower Bottom
|| Another -bottom. Also a redundancy, as the "bottom" is the lowest place by definition.
|| {{w|Devon}}
||
|-
| Southframpton
|| A confusion with {{w|Southampton}} which is nearby the location shown. The use of the postfix "frampton" is a reference to the "Frampton" elsewhere on the map, just as Southampton is distinguished from {{w|Northampton}}.
|| {{w|Milford on Sea}}
|| Frampton happens to be a common surname in the area.
|-
| Blandford
|| {{w|Blandford|No joke}}
|| {{w|Cornwall}}
|| The real Blandford is a bit further east, in Dorset, roughly under the m in 'Southframpton'.
|-
| Menthol
|| {{w|Menthol}} is a chemical with minty taste that produces a cooling sensation, and is used in mints and flavoured cigarettes.
|| {{w|Eastbourne}}
|| Possibly a reference to Methil in Fife (but possibly not).
|-
| West Sea
|| Literal description.
|| {{w|Atlantic Ocean}}
|| Historically, this was the name for the ocean off the UK's west coast. According to the {{w|Shipping Forecast#Region names|list of sea areas}} used in the UK's {{w|Shipping Forecast}}, that region of sea is called "Lundy"
|-
| Tarp
|| Tarp, short for {{w|tarpaulin}}, is a waterproof sheet for storage and weather protection.
|| {{w|Teignmouth}}
||
|-
| Longbit
|| Literal description.
|| {{w|Cornwall}}
||
|}

==Transcript==

:[A black-and-white map of Great Britain. The detail on the map is minimal, showing mainly the outlines of the land, chevrons representing otherwise sparse areas of high hills or mountains, and points representing cities. The only other features are a small drawing of a protractor south of one peninsula, a lake with two small sailboats on the west side of the largest landmass, and a short dashed line in the southeast connecting the main landmass to another section of land across water. The caption in the upper-right states in large letters "A BRITISH MAP," then in smaller letters underneath, "LABELED BY AN AMERICAN." Most of the map's area is covered by labels for various features, which are listed below.]

<nowiki>
[In Scotland, from north to south:]
Helcaraxë
Blick
Everdeen
Norther Sea (to the west)
Highlands
Loch Lomond
Fjordham
Glassdoor
Eavestroughs
Seasedge
Meowth
Chough
Blighton
Glutenfree

[In England, from north to south:]
Eyemouth
Earhand
Hairskull
Lakebottom
Braintree
Skinflower
Weedle
Bjork
Crewneck
Paisley
Eeugh
Aidenn
Basil
Hillfolk
Waterdown
Borough-Upon-Mappe
Cadbury
Landmouth (to the East)
The Shire
West Norsussex
Redsox
Hamwich
Lionsgate
Keebler
South Norwessex
Kingsbottom
Cambridge
Frampton
Nothingham
Cair Paravel
Dampshire
Cumberbatch
Oxford
Paulblart
Corbyn
London
GMT
BBC Channel 4 (to the West)
Minas Tirith
Tems-Upon-Thames
Tubemap
Hogsmeade
Cambnewton
Oughghough
Efrafa
Chansey
Sundial
Lower Bottom
Dobby
Menthol
West Sea (to the West)
Blandford
Southframpton
Tarp
Longbit

[In Wales, from north to south:]
Fhqwhgads
Cabinetry
Bloughshire
Aberforth
Dryford
Kingsfriend
Camelot
The CW
Whaling
Moorhen
Cardigan

[In Northern Ireland:]
Belfast Devoe

[In the Republic of Ireland:]
Dubstep
</nowiki>

{{comic discussion}}

[[Category:Maps]]
[[Category:Harry Potter]]
[[Category:Chronicles of Narnia]]
[[Category:Fiction]]

2932: Driving PSA

2024-05-15T00:54:08Z

McMooseElk: Increased precision of statement

{{comic
| number = 2932
| date = May 13, 2024
| title = Driving PSA
| image = driving_psa_2x.png
| imagesize = 414x538px
| noexpand = true
| titletext = This PSA brought to you by several would-be assassins who tried to wave me in front of speeding cars in the last month and who will have to try harder next time.
}}

==Explanation==
{{incomplete|Created by a CLUELESS BOT DRIVING AT 72.42048 km/h (20.1168 m/s) (outpaced by raptor) - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

A PSA is a {{w|Public Service Announcement}}. Some drivers, when having priority by the rules of the road (termed "{{w|Traffic#Passage_priority_(right_of_way)|right of way}}", in legal statutes), will let others take it before them. This comic is saying that people who exhibit this behavior are actually {{w|The_Terminator|Terminator}}-style assassins, sent to kill people by sending them into contention with other traffic and making it look like an accident.

Despite the PSA's conspiratorial presentation, this is good advice. This gesture is sometimes called "the wave of death", because it is common for such "generous" drivers to forget about other lanes that also have priority over the crossing driver or pedestrian, and cluelessly wave them through right into the path of another car which is traveling at full speed. Always check for yourself that your way is clear, and if your view is blocked, sit tight. In this comic, there is a queue of vehicles (including a large tractor-trailer truck) held up by the 'considerate' driver that would obscure the immediate view of the moving vehicle at the most potentially dangerous time. Randall's exaggeration has comical intent and also could help make the advice more memorable - and therefore more likely to save lives.

The title text explains that Randall made this PSA because he has experienced this multiple times in the last month. Since this behavior is often catastrophically dangerous, he believes the action could only be performed by time-travelling assassins. As such, he has not accepted the right of way, and thus believes himself to have evaded death. He then says that, since he already knows this trick, the assassins should try harder. Such a claim that assassins are actively trying to murder him using "right of way" would be treated as a conspiracy theory by most people.

===Alternate interpretation of the waving gesture===

Note that in this comic, as illustrated, there is potentially sufficient room for the waiting car to pass the first set of lanes and (illegally) stop next to the median, protected from passing traffic on both sides, to stop halfway through its left turn to wait for the second stream of traffic to subside. Waiting in this turning area next to the median is a common maneuver in rural US areas where these types of non-signaled intersections are common, though it is illegal in many jurisdictions. (Turn lanes are not legally usable for merging in many, although not [https://le.utah.gov/xcode/Title41/Chapter6A/41-6a-S801.html?v=C41-6a-S801_2015051220150512 all], jurisdictions, & stopping in an intersection is also not permitted.) There's no reason to assume that the would-be assassin is not simply waving the waiting car to the safety of the median area. Randall's message of caution is still sound, but he accidentally illustrated an intersection diagram that fails to optimally support his case.

[[File:2932 Alt.png|frameless|Illustrtion showing room to safetly turning left halfway, stopping in the median]]

^Stopping in this area is illegal & may incur a traffic citation.{{citation needed}}

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:Driving PSA:
:Random drivers can’t grant you the right of way as a gift.
:[A T-intersection with a major road separated by a concrete median going from top to bottom, and a minor road coming from the left]
:[A car is stopped at the end of the minor road]
:First car [arrow pointing to car]: You, waiting to turn left
:[A second car is stopped in the dedicated left turn lane of the right major road, with a third car, a truck hauling cargo, and a fourth car lined up behind it]
:Second car [in a speech bubble]: You go ahead! I’m feeling generous.
:Second car [arrow pointing to car]: Time traveler pretending to be polite
:[In the second lane is a black arrow pointing upwards, with text below it reading 45 MPH, and a fifth car below the text]
:Fifth car [arrow pointing to car]: Car that they are waving you into the path of
:If someone waves you out, assume that they are an assassin sent from the future to kill you and make it look like an accident.

{{comic discussion}}

[[Category:Time travel]]

2932: Driving PSA

2024-05-14T12:27:49Z

McMooseElk: rephrased lane wording

2932: Driving PSA

2024-05-14T12:25:20Z

McMooseElk: grammar stuff and spelling

2932: Driving PSA

2024-05-14T12:20:07Z

McMooseElk: missed a word

2932: Driving PSA

2024-05-14T12:19:04Z

McMooseElk: Updated transcript to be less ambiguous

2932: Driving PSA

2024-05-14T04:07:47Z

McMooseElk: /* Transcript */

2932: Driving PSA

2024-05-14T03:51:54Z

McMooseElk: /* Transcript */

2932: Driving PSA

2024-05-14T03:47:14Z

McMooseElk: updated transcript

2917: Types of Eclipse Photo

2024-04-17T13:18:58Z

McMooseElk: /* Explanation */

{{comic
| number = 2917
| date = April 8, 2024
| title = Types of Eclipse Photo
| image = types_of_eclipse_photo_2x.png
| imagesize = 594x460px
| noexpand = true
| titletext = The most rare, top-tier eclipse photo would be the Solar Earth Eclipse, but the Apollo 12 crew's attempt to capture it was marred by camera shake. They said it looked spectacular, though.
}}

==Explanation==
{{incomplete|Created by an AUSTRALIAN CLOUD FROM THE FUTURE - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

On the day of this comic's release, {{w|Solar eclipse of April 8, 2024|a total solar eclipse}} traversed North America, allowing a substantial portion of the United States to view this phenomenon. Total {{w|eclipse}}s in any given area are rare enough and impressive enough that witnessing it was a huge event for many people, both those living in the zone of totality and the many people who traveled specifically to view it. This strip addresses the event through different types of photos that people might take.

'''The Standard:''' A photo of the solar eclipse during totality, a typical photo most people might hope to take (examples shown [https://cdn.mos.cms.futurecdn.net/kyhZsybgc7dnqLsphVL88R-650-80.jpg.webp here] and [https://ichef.bbci.co.uk/images/ic/1376xn/p0hq71pb.jpg.webp here]). This photograph captures the Sun totally blocked by the Moon, with a barely visible ring of light around the outside, which comes from its 'atmosphere' and other external features, rather than the solar surface that would normally be visible.

'''The Partial:''' A photo of the eclipse in progress, likely approaching totality (example shown [https://patch.com/img/cdn20/users/24074589/20240126/011227/styles/patch_image/public/eclipse-shutterstock-149065532___26131150810.jpg?width=1200 here]). Another typical photo most viewers take as the eclipse progresses, and the only type of image available to people [[2914: Eclipse Coolness|outside the zone of totality]].

'''The Reaction Shot:''' During an eclipse, people tend to gather outside in crowds to witness the event in person. Images of people gathering and looking up at the sky capture the human side of this event, and is likely to be more personal to the person taking the photo (particularly since the people may be their friends and family). This [https://globalnews.ca/news/10410279/eclipse-photos-2024-north-america/ article] by Global news shows several reaction pictures such as [https://globalnews.ca/wp-content/uploads/2024/04/CP170420992.jpg?quality=85&strip=all&w=1200 this] and [https://globalnews.ca/wp-content/uploads/2024/04/CP170420242.jpg?quality=85&strip=all&w=1200 this].

'''The Fancy Lens:''' A photo of this type (examples shown [https://cdn.mos.cms.futurecdn.net/x7btBqQ4yaUGUFUCT6F95F-1600-80.png here] and [https://ichef.bbci.co.uk/images/ic/1024xn/p0hq71zc.jpg.webp here]), that features conspicuous {{w|solar prominence}}s, will almost certainly require a lot more preparation and equipment (the 'fancy lens', a tripod or other mounting, etc). The prominences are dim, compared to the Sun, and usually are visible only when the Sun is completely covered because of contrast issues. Due to the lack of significant atmosphere on the Moon, the hard edge of the similarly-sized Moon can reveal these details whilst obscuring the usually dominant sunlight.
:The eclipsing body can't extend much beyond the Sun without also hiding the prominences, but that is the fortunate situation with Earth-Moon-Sun eclipses having the Moon, often ''just'' large enough to cut out the solar disc. It varies, but the {{w|Solar eclipse#Types|usual exception}} is the Moon being slightly too far away in its orbit (combined with the Earth being marginally closer to the Sun, in its own orbit) to obscure the whole body of the Sun, leaving a bright ring of solar surface visible. Such an annular eclipse gives similar lighting problems as with a high-percentage partial one; or during the phases leading up to/away from actual totality.

'''The Focus Issues:''' People new or unaware of the difficulties of astral photography typically experience challenges focusing their lenses on astral bodies, especially if they are trying to fight against a confused auto-focus. The eclipse is no exception to this, and this type of photo popped up more frequently during this event because more people were taking this fleeting opportunity to take photos of the sky than usual. This [https://www.businessinsider.com/solar-eclipse-photo-advice-pro-photographer-2024-4 article] explains some of the tips (such as using a tripod to steady the camera and using manual settings for exposure and focus) to get professional looking pictures of eclipses and shows pictures of an [https://i.insider.com/661462313f923f7dab05ba2e?width=1000&format=jpeg&auto=webp amateur (left) vs a professional (right)] picture.

'''The Traffic Jam:''' Since the experience of a total eclipse is only available in a specific geographical range, it's extremely common for people to travel to view them, particularly when this range is near to heavily populated areas (as in this case). The number of people trying to get into a particular area for a particular event naturally causes huge issues of traffic and accommodations. One example is traffic jams, which can become huge and last for many hours. The Daily Gazette [https://www.dailygazette.com/news/northway-eclipse-traffic/article_b6caad62-f6b4-11ee-b1b7-a76cdd73b560.html reports] a number of traffic related slowdowns ([https://bloximages.chicago2.vip.townnews.com/dailygazette.com/content/tncms/assets/v3/editorial/d/f6/df60ce28-f687-11ee-aff2-5f944ac2e1e0/661562238083b.image.jpg?resize=375%2C500 photo 1], [https://bloximages.chicago2.vip.townnews.com/dailygazette.com/content/tncms/assets/v3/editorial/7/2b/72b670a2-f687-11ee-bd48-074d85985429/661561749830e.image.jpg?resize=400%2C533 photo 2]) in Schenectady, New York as people return from viewing the eclipse. It states many people spent double the normal time to get to their destination as compared to normal (non post-eclipse) travel. The irony of waiting in traffic for hours in order to see an event lasting several minutes can be frustrating, and an image of the traffic jam may be a bitter way to capture this irony.

'''The Astronaut:''' Astronauts on the {{w|International Space Station}} had a particularly unusual view of the solar eclipse, seeing the Moon's shadow on the Earth's surface. [https://www.forbes.com/sites/jamiecartereurope/2024/04/08/total-solar-eclipse-photos-nasa-astronauts-take-historic-images-from-space/?sh=4139cb0465aa Forbes] has an article that shows the pictures of the [https://imageio.forbes.com/specials-images/imageserve/6616ae80477b4ce765cb35fa/IMG-5058/960x0.jpg?format=jpg&width=1440 eclipse] from NASA and the ISS in orbit 250 miles (400 km) above the Earth.

'''The "Frustratedly Looking up the Cloud Situation in Australia for 2028":''' There were clouds over a large portion of the United States and Canada during the April 2024 eclipse. This is a [https://www.cnet.com/a/img/resize/93a01e5edfb6d8e325341d0bdff1e3a1ca65977c/hub/2024/04/08/c52c7409-e6f3-4b37-9b9b-e0e002e4f8db/gettyimages-2141954790.jpg?auto=webp&width=1200 photo] similar to the one in the comic, taken in Niagara Falls, Ontario where it was cloudy during the eclipse. For most of North America, this meant that heavy cloud cover [[2915: Eclipse Clouds|blocked their view of the Sun during the eclipse]], badly impacting the viewing experience. This was naturally highly undesirable, particularly those who had planned and traveled to see it. The joke here is that such a person, seeing only clouds during the eclipse, might try to figure out the next time that seeing an eclipse would be possible. There will be a {{w|Solar eclipse of July 22, 2028|total eclipse passing over Australia and New Zealand in 2028}}. For someone in the United States, this would require a much more significant trip than the 2024 trip, but someone who missed one eclipse might be willing to go to extremes to see another. The irony is that weather is impossible to accurately predict 4 years in the future, so such a plan would involve the risk of traveling halfway around the world, only for them to [https://www.timeanddate.com/eclipse/in/australia?iso=20280722 more likely than not] miss another eclipse due to overcast or cloudy weather.

One common type of eclipse image (albeit from more experienced photographers with photo-editing experience) is '''the timelapse''' photo (examples [https://cdn.mos.cms.futurecdn.net/Hf2bk7ineG6zdr3xn5CjxW-970-80.jpg here] and [https://www.pentaxforums.com/forums/attachments/173-general-photography/627016d1708011779-time-lapse-upcoming-solar-eclipse-capture.jpg here]) which Randall does not reference in his comic (although a timelapse could feature photos used in the comic). A timelapse eclipse photo includes multiple exposures of the eclipse at multiple times, often before eclipse totality, during totality and after totality; effectively superimposing the before, during and after shots of the eclipse in a single image.

The title text refers to a [[:File:Apollo_12_view_of_Solar_Eclipse_(5052129615).jpg|photograph]] taken during the {{w|Apollo 12}} mission when the Earth came between the spacecraft and the Sun on the journey back home from the Moon. Technically there is a "Solar Earth Eclipse" every night, as the Earth is then between you and the Sun and shades your view of it, but Randall is referring to an incident when Apollo 12 was positioned such that the spacecraft, Earth, and Sun lined up. The photograph was taken shortly before totality; other pictures as well as video footage during totality [https://whenisthenexteclipse.com/50-years-ago-today-the-apollo-12-crew-created-their-own-total-solar-eclipse/ were taken], but are of considerably lower quality due to a shaky camera.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:<big>Types of Eclipse Photo</big>

:[Eclipse during totality]
:The Standard

:[Partial eclipse with lighter sky]
:The Partial

:[Two Cueballs and Ponytail looking and pointing at the sky]
:The Reaction Shot

:[Eclipse during totality with red "ribbons" around the Moon]
:The Fancy Lens

:[A blurry ring of light in the center]
:The Focus Issues

:[The rear of an SUV]
:The Traffic Jam

:[A dark circle on Earth's surface]
:The Astronaut

:[A gray cover of clouds]
:The "Frustratedly Looking up the Cloud Situation in Australia for 2028"

==Trivia==
* The [https://imgs.xkcd.com/comics/types_of_eclipse_photo.png standard size] image was uploaded with a resolution/size of 8920 by 6909, larger than the supposed 2x version at 1189 by 921. This was likely an error, and has since been fixed.

{{comic discussion}}

[[Category:Comics with color]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Ponytail]]
[[Category:Multiple Cueballs]]
[[Category:Solar eclipses]]
[[Category:Astronomy]]
[[Category:Weather]]
[[Category:Photography]]

Header text

2023-12-17T13:31:15Z

McMooseElk: Fixed typo

[[File:xkcd_header.png|thumb|right|250px|The header segment on [[xkcd|xkcd.com]]]]
The '''header text''' is updated whenever [[Randall]] has news to share. However, after the novelty of the news ends, the page usually goes back to its default header text, which states:

:xkcd updates every Monday, Wednesday, and Friday.

In recent times there has been very long between the old go to text has been used for extended periods though. The most recent header text can be found at the top of the [[Header_text#Global_header_text|Global header text]] section, if it has been updated since the last change.

Usually, changes to the header text show up in all comics. However, in certain cases, the header text of a specific comic is changed permanently, which means it won't be modified like the rest of the comics. See the list of these comics [[#Comic-specific header text|here]]

==Comic-specific header text==
{{incomplete|This list is missing many comic-specific header texts. Don't remove this notice unless they're all mentioned here. [[Talk:header_text#1047|See the Talk page]] for some examples.}}

When editing the section, list the changes chronologically with the date of the web archive link and hyperlink each date. Include an internal link to the comic at the time of each change and describe the modifications with relevant information. Place the most recent changes at the top.

===Instructions===
*[[2601: Instructions]]
**This comic's header mentions the people who helped put it together.
***It was on the front page from Friday [https://web.archive.org/web/20220401210146/https://xkcd.com/ 2022-04-01] until Monday [ 2022-04-04], until the new comic was released on Monday.
****Expect there to be a page from April 4, but at this point there is one from [https://web.archive.org/web/20220406124444/https://xkcd.com/ 2022-04-06] showing the front page having returned to normal header.
**The text:
***Today's comic was created with [https://twitter.com/fadinginterest Patrick], [https://twitter.com/Aiiane Amber], [https://twitter.com/chromakode @chromakode], [https://twitter.com/dyfrgi Michael], [https://twitter.com/wirehead2501 Kat], [https://twitter.com/xDirtyPunkx Conor], [https://twitter.com/zigdon @zigdon], and [https://twitter.com/bstaffin Benjamin Staffin].
**It thanks those that helped Randall create that years [[:Category:April fools' comics|April fools' comic]].
***All have a link to their name, the first with an Instagram page, the other seven with a link to their Twitter account. Five of those also helped with the previous April Fools' comic, see below.
**Since this header was related only to the Fools' comic, it was removed from the frontpage header, when the next comic was released.
***But it stayed up as one of the permanent different headers on this comic, as seen two days after it stopped being on the front page on [https://web.archive.org/web/20220406021357/https://xkcd.com/2601/ 2022-04-06].
**See the comic on xkcd {{xkcd|2601}}.

===Checkbox===
*[[2445: Checkbox]]
**This comic's header mentions the people who helped put it together.
***It was on the front page from Thursday [https://web.archive.org/web/20210401232108/https://xkcd.com/ 2021-04-01] until Monday [https://web.archive.org/web/20210405130031/http://xkcd.com/ 2021-04-05], until the new comic was released on Monday.
**The text:
***This comic was put together by [https://chromakode.com/ Max Goodhart], [https://twitter.com/fadinginterest Patrick], [https://twitter.com/Aiiane Amber], [https://twitter.com/bstaffin Benjamin Staffin], [https://twitter.com/cotrone Kevin Cotrone], [https://twitter.com/wirehead2501 Kat], and [https://twitter.com/dyfrgi Michael Leuchtenburg].
**It thanks those that helped Randall create that years [[:Category:April fools' comics|April fools' comic]].
***All have a link to their name, the first with a personal home page, the other six with a link to their Twitter account. Five of those also helped with the previous April Fools' comic, see below.
**Since this header was related only to the Fools' comic, it was removed from the front page header, when the next comic was released, here from the day after that release Tuesday [https://web.archive.org/web/20210406143023/http://xkcd.com/ 2021-04-06].
**But it stayed up as one of the permanent different headers on this comic, as seen two days later on [https://web.archive.org/web/20210407203547/https://xkcd.com/2445/ 2021-04-07].
**See the comic on xkcd {{xkcd|2445}}.

===Collector's Edition===
*[[2288: Collector's Edition]]
**This comic's header mentions the people who helped put it together.
***It was on the front page only for about a day around April 3rd and [https://web.archive.org/web/20200404014814/http://xkcd.com/#-370,-277vApril 4th 2020].
**The text:
***Today's comic was put together by [https://chromakode.com/ Max Goodhart], [https://twitter.com/Aiiane Amber], [https://twitter.com/bstaffin Benjamin Staffin], [https://twitter.com/cotrone Kevin], [https://www.instagram.com/fading_interest/ @fading_interest], [https://twitter.com/wirehead2501 Kat], [https://twitter.com/zigdon @zigdon], and Christopher Night.
****All names have links except the last.
**It thanks those that helped Randall create the 2020 [[:Category:April fools' comics|April fools' comic]], which had taken two extra days before it was released due to the complex nature of the comic.
*Due to the delay the next comic, [[2289: Scenario 4]], was released already the day after the Fool's comic, even though it was thus [[2289:_Scenario_4#Trivia|on a Saturday]]!
**Since this header was related only to the Fools' comic, it was removed from the front page header, when the next comic was released, but it stayed up as one of the permanent different headers on this comic
**See the comic on xkcd {{xkcd|2288}}.

=== Seven Years===
*[[1928: Seven Years]]
**[http://web.archive.org/web/20171214171157/https://xkcd.com/ 2017-12-14]
**It was released as a response to another cancer diagnosis, this is explained in the [[Design_of_xkcd.com#Header_text|Header text]] which has replaced the standard ''xkcd updates every Monday, Wednesday, and Friday.'' The new one is this one, with the active link included:
**The text (with link):
***Becky Beaton, sister of fellow cartoonist Kate Beaton, has also been diagnosed with cancer. You can support her treatment [https://www.youcaring.com/beckybeaton-1008390 here].
**{{w|Kate Beaton}} is the creator of the web comic [http://www.harkavagrant.com/ Hark! A Vagrant].
***Although this comic is not one on Randall's list of ''[[Design_of_xkcd.com#Comics_I_enjoy|Comics I enjoy]]'', he is clearly much influenced by another cancer diagnosis among someone in his own creative field.below.
**On [https://web.archive.org/web/20190817141450/https://www.xkcd.com/1928/ 2019-08-17], close to two years later, the message was still there and also [https://web.archive.org/web/20211226120634/https://xkcd.com/1928/ 2021-12-26] just past four years later.
***There was the possibility that it would be removed, when the support page was discontinued...
***But as that already happened before [http://web.archive.org/web/20181106124430/https://www.youcaring.com/beckybeaton-1008390 2018-11-06] it seems like it will be there to stay.
***Last archived version was from [http://web.archive.org/web/20180305022301/https://www.youcaring.com/beckybeaton-1008390 2018-03-05].
***Randall has previously done something similar for another friend, Emiliy, but [[#2014-11-27_-_Help_Emily|that header]] was not made permanent.
**See the comic on xkcd {{xkcd|1928}}.

===ISS Solar Transit 2===
*[[1830: ISS Solar Transit 2]]
**[https://web.archive.org/web/20170428041338/https://xkcd.com/ 2017-04-28]
**This header links back to [[1828: ISS Solar Transit]], a comic with the same joke setup released on the Monday of the same week
**See the comic on xkcd {{xkcd|1830}}.

===Meteorite Identification===
*[[1723: Meteorite Identification]]
**Randall realized that his comic was almost a copy of some other person. And he has since then acknowledged this on the comics specific page see more [[1723: Meteorite Identification#Trivia|here]].
**At the time of this post, in the newest saved version on the archive from [http://web.archive.org/web/20161010215516/http://xkcd.com/1723/ 2016-10-10] it is still there and says:
***Note: Jolyon, founder of [http://www.mindat.org/ mindat.org], made a similar chart way before me!
**See the comic on xkcd {{xkcd|1723}}.

===Substitutions 3===
*[[1679: Substitutions 3]]
**This was the third installment of Substitutions and as he did with [[#Substitutions 2|the second]] linking to the first and telling about browser extensions for this he did the same with this one:
**The text:
***(Previously: {{xkcd|1288|Substitutions}} and {{xkcd|1625|Substitutions 2}})
***Note: There are various [https://chrome.google.com/webstore/detail/replacerator/gaajhenbcclienfnniphiiambbbninnp?hl=en browser extensions] for this.
**It was on the main page while the comic was up, for instance here on [https://web.archive.org/web/20160512102325/http://xkcd.com/ 2016-05-12].
**See the comic on xkcd {{xkcd|1679}}.

=== Garden===
*[[1663: Garden]]
**This comic had a header text to help people use the comic when it came out.
**For some time this text was the main header text, but after a while is disappeared from the main header, but remained as the header for Garden.
***See more [[xkcd_Header_text#2016-04-04_-_Protip_on_Garden|below]] or on the Garden page [[Garden#Header_text_after_release|here]]
**Today and as of the newest saved version on the archive from [http://web.archive.org/web/20161231231600/http://xkcd.com/1663/ 2016-12-31] it is still there and says:
***Protip: If you don't like how your garden is growing, you can click to prune it.
***You can copy the URL to share your garden. From other browsers, it will be view-only.
**See the comic on xkcd {{xkcd|1663}}.

===Substitutions 2===
*[[1625: Substitutions 2]]
**This was the second installment of Substitutions and Randall links to the first and tells about browser extensions for this:
**The text:
***(Previously: {{xkcd|1288|Substitutions}})
***Note: There are various [https://chrome.google.com/webstore/detail/xkcd-substitutions/jkgogmboalmaijfgfhfepckdgjeopfhk?hl=en browser extensions] for this.
****He did the same when [[xkcd_Header_text#Substitutions_3|Substitutions 3]] came out, linking to the two previous.
**It was on the main page while the comic was up, for instance here on [https://web.archive.org/web/20160104171722/http://xkcd.com/ 2016-01-04].
**See the comic on xkcd {{xkcd|1625}}.

===United Shapes===
*[[1079: United Shapes]]
**The header was unique for this comic on the day it came out: [https://web.archive.org/web/20120709045709/http://xkcd.com:80/ 2012-07-09].
**The text:
***There's a larger version of this map [http://xkcd.com/1079/large/ here] (Colorado is [http://xkcd.com/1079/colorado/ here]).
***It's also available as a [https://web.archive.org/web/20120709045709/http://store.xkcd.com/xkcd/#StateMap poster].
**The text was never on other pages:
***Before US was released, also on [https://web.archive.org/web/20120709004956/http://www.xkcd.com/ 2012-07-09] the comic [[1078: Knights]] was on the main page, with the previous [[xkcd_Header_text#2012-04-09 -_Standard_text_plus_store_link|promotion of the store]].
***The US version was still on the front the day after [https://web.archive.org/web/20120710063424/http://xkcd.com/ 2012-07-10].
***But the same day [https://web.archive.org/web/20120710114846/http://xkcd.com/1078/ 2012-07-10] the page for Knights did show a new header, which may only have been active on other pages than the front on this day... See details here [[xkcd_Header_text#2012-07-10_-_New:_what-if.xkcd.com|New:_what-if.xkcd.com]]
****Here is another page from [https://web.archive.org/web/20120710095644/http://xkcd.com/1070/ 2012-07-10] with [[1070: Words for Small Sets]], that was also saved that day, so this was on the top of all other comics, except the front page.
**There are simply no version of the front page from the 11th and 12th of July 2012. But from other pages it can be shown that from the 11th there was a difference.
***On [https://web.archive.org/web/20120711223349/http://xkcd.com/1078/ 2012-07-11] on the page for Knights and for instance from the same day on page number [https://web.archive.org/web/20120711223339/http://xkcd.com:80/1077 1077] [[1077: Home Organization]] there is the same but new header, different than the one Knights had both two days before and the other one from the day before.
***And also on [https://web.archive.org/web/20120711123734/http://xkcd.com:80/1079/ 2012-07-11] the numbered page {{xkcd|1079}} for US displays a mix of this new and the unique version of the header text.
****It left our the part about Colorado and moved the bottom line up so the unique part is written in one line (that may still take up two lines as the text will spill over, (maybe just in some browsers?)
****And then it added the two lines of header text that was on all the other pages (presumably also the front page, but that was first proved with the version from [https://web.archive.org/web/20120713154207/http://xkcd.com/ 2012-07-13]).
****And this is the version still shown on {{xkcd|1079}} today, even though the bottom lines was a normal header that was supposed to disappear.
**The final text that is still on US today:
***There's a larger version of this map [http://xkcd.com/1079/large/ here]! It's also available as a [https://store.xkcd.com/collections/posters/products/united-shapes-poster poster].
***New: [https://what-if.xkcd.com/1/ what-if.xkcd.com]: abusing science to answer hypothetical questions.
***I'll answer a new reader question every Tuesday.
****Here above the link has been updated to the one in the current version, where as the above link in the original version, that is now a dead link, has been directed to an archived version of the stores poster.
****The link the new part is to the very first ''[[what if? (blog)|what if?]]'' article ''{{what if|1|Relativistic Baseball}}'' which was released on 2012-07-10, the day after US was released, but before the next comic [[1080: Visual Field]] was released on 2012-07-11.
*****There are no version of comic {{xkcd|1080}} archived while it was on the front page, so it is not possible to tell what the front page looked like on the 11th and 12th of July. But best guess is that it looked like that on Knight shown above from the 11th.
**The first version was on the main page while the comic was up.
***Maybe there was a time with the final version on the front page, but seems like Randall put the new header text there in hand, and forgot to delete it after, so he probably first changed it when the new comic came out.
***Since the new header was important, promoting his new ''what if'' blog, he likely did not wish to have a fairly new page (maybe even on the front page on the 10th) without the reference. Also he did not wish to remove the link to the poster in the store.
***But this makes it a special unique header, as a relic from the past header text is left together with the text that was supposed to be permanent. It should have been deleted when the link to ''what if'' 1 was removed.
**See the comic on xkcd {{xkcd|1079}}.

===Approximations===
*[[1047: Approximations]]
**It has a permanent text saying that many people emailed Randall about another approximation for one year than the one given in the comic.
***As it was already there from the release day on [https://web.archive.org/web/20120425220409/http://xkcd.com:80/ 2012-04-25] it seems unlikely that he actually received those e-mails before changing the header text for this comic!
**The unique text:
***Lots of emails mention the physicist favorite, 1 year = pi x 107 seconds.
***75^4 is a hair more accurate, but it's hard to top 3,141,592's elegance.
**There was a different header on other comics even while this comic was on the front page with the unique text. See [[#2012-04-09_-_Standard_text_plus_store_link|Plus store link]].
**See the comic on xkcd {{xkcd|1047}}.

===Umwelt===
*[[1037: Umwelt]]
**It has a permanent promotion of the store already from the release day on [https://web.archive.org/web/20120401151639/http://xkcd.com:80/ 2012-04-01]:
**The unique text:
***You can get posters, prints, and t-shirts in the [https://store.xkcd.com/ xkcd store].
**It stayed on the front page while this comic was the most recent, so for instance also two days later on [https://web.archive.org/web/20120403223453/http://www.xkcd.com/ 2012-04-03]
***There was a different header on other comics even while this comic was on the front page with the unique text. See [[xkcd_Header_text#2012-03-28_-_Visiting_Newport_News|Visiting Newport News]].
**See the comic on xkcd {{xkcd|1037}}.

===s/keyboard/leopard/===
*[[1031: s/keyboard/leopard/]]
**In response to the idea of having you browser replace keyboard with leopard a reader made a script that could do just that.
**Randall seem to have gotten this script before release (or at least on the day of release) as it was already the header text on [https://web.archive.org/web/20120319130702/http://xkcd.com/ 2012-03-19] the day the comic was released.
**The unique text is:
***A helpful reader has provided an [https://userscripts.org/scripts/show/128626 s/keyboard/leopard/ user script].
****The link does not go anywhere useful any longer, but here is the archived version of the link from two days after the release of the comic on [https://web.archive.org/web/20120321174019/http://userscripts.org/scripts/show/128626 2012-03-21]
**It was never changed on the other comics so was only on the front while this comic was up until 2012-03-21
***Here also shown on the second day it was up on its own page on [https://web.archive.org/web/20120320143916/http://xkcd.com:80/1031/ 2012-03-20].
**The next comic [[1032: Networking]] came out on [https://web.archive.org/web/20120321205835/http://xkcd.com:80/ 2012-03-21] and here the header text has returned to what it was before the leopard comic: [[xkcd_Header_text#2012-03-12_-_xkcd_Holistic_Browser|xkcd Holistic Browser]].
***Here are examples from dates around this showing it was not used on other pages:
****The last archived version of the front page from before the 19th was this version from [https://web.archive.org/web/20120317121834/http://xkcd.com:80/ 2012-03-17], but here is an example from [https://web.archive.org/web/20120318153256/http://xkcd.com:80/1030/ 2012-03-18] (from comic [[1030: Keyed]]), the day before leopard comic came out.
****Both on [https://web.archive.org/web/20120319174700/http://xkcd.com/1030/ 2012-03-19] (from comic [[1030: Keyed]]) and on [https://web.archive.org/web/20120320191039/http://xkcd.com:80/1012 2012-03-20] (from comic [[1012: Wrong Superhero]]) during the time leopard was up, the header text currently in used was still shown.
**See the comic on xkcd {{xkcd|1031}}.

===Making Things Difficult===
*[[996: Making Things Difficult]]
**Randall links to a blog post about cancer as related to this cancer comic
**The unique text:
***Some context for the cancer comics:
***[https://blog.xkcd.com/2011/06/30/family-illness/ https://blog.xkcd.com/2011/06/30/family-illness/]
****The link is for post on his [[Blag]].
****It is on the oldest stored version from [https://web.archive.org/web/20111229043804/http://xkcd.com:80/ 2011-12-29] when it was on the header.
**See the comic on xkcd {{xkcd|996}}.

===Money===
*[[980: Money]]
**Randall notes his thoughts about making it and makes a promotion of the poster.
**The unique text:
***This one was fun (and exhausting) to make.
***There's a poster of it in the [https://store.xkcd.com/products/money-poster store]!
****It is both at the oldest stored version from [https://web.archive.org/web/20120404110059/http://xkcd.com:80/980 2012-04-04] and the newest at time of editing [https://web.archive.org/web/20220108132250/https://xkcd.com/980/ 2022-01-08].
**See the comic on xkcd {{xkcd|980}}.

===Map Projections===
*[[977: Map Projections]]
**Randall notes that a person had birthday on the release of this comic about maps, and this guy has maps on his homepage
**The unique text:
***It turns out Monday was Steve Waterman's birthday. His [https://web.archive.org/web/20111118003418/http://www.watermanpolyhedron.com/ site] has posters of his map, plus maybe the world's only Winkel Tripel-critiquing poetry.
****The link goes to [http://www.watermanpolyhedron.com/ Waterman project] home page. Above the link goes to an archived version from around the time of release of the header text.
****It is at the oldest stored version with the comic on the front page on [https://web.archive.org/web/20111115231643/http://xkcd.com:80/ 2011-11-15].
**See the comic on xkcd {{xkcd|977}}.

===Na===
*[[851: Na]]
**After Randall made this comic, he realized he could have "made it better" and changed the header text to:
***I can't ''believe'' I forgot Hey Jude.
***I don't get do-overs, but I couldn't resist making [https://xkcd.com/851_make_it_better/ a fixed version].
**See more about it in that comics [[851:_Na#Trivia|trivia section]].
**See the comic on xkcd {{xkcd|851}}.

===Malamanteau===
*[[739: Malamanteau]]
**Randall notices that he has changed this comics license, so it can be used on Wikipedia.
**The text:
***At Wikipedia's request, I release this comic under a [https://creativecommons.org/licenses/by-sa/3.0/us/ cc-by-sa] license.
****The link is to the page regarding {{w|Creative Commons license}} in the US.
****Specifically for Attribution-ShareAlike 3.0 United States (CC BY-SA 3.0 US)
*****Usually xkcd is [[Design_of_xkcd.com#License_and_copyright|shared under]] [http://creativecommons.org/licenses/by-nc/2.5/ Creative Commons Attribution-NonCommercial 2.5 License]. This does not allow commercial use, But the 3.0 does.
**When the comic came out it had the normal header text from that time, as seen here two days after release on [https://web.archive.org/web/20100514072436/http://xkcd.com/ 2010-05-14].
***First archived version with the unique text is from [https://web.archive.org/web/20100913003146/http://xkcd.com/739/ 2010-09-13], but the previous archived version of this comic is from [https://web.archive.org/web/20100713160533/http://xkcd.com:80/739/ 2010-07-13].
***So it happened somewhere in the two months in between. But at least it was not there the first two months after release, but there before four month after release.
**See the comic on xkcd {{xkcd|739}}.

===Steal This Comic===
*[[488: Steal This Comic]]
**Randall is tired of {{w|DRM}}, an acronym standing for Digital Rights Management. This comic displays this. He thus make a promotion of Amazon that sells music without DRM.
**The text:
***Note: the [https://www.amazon.com/MP3-Music-Download/b?ie=UTF8&node=163856011 Amazon.com MP3 store] sells DRM-free music. Kudos.
****The link is to Amazon MP3 music. Here is an archived version from [https://web.archive.org/web/20081001083843/http://www.amazon.com/MP3-Music-Download/b?ie=UTF8&node=163856011 2008-10-01], two weeks prior to the release of the comic.
**The header text was on the comic from the release day, here seen the day after on the first archived version from [https://web.archive.org/web/20081014232952/http://xkcd.com/ 2008-10-14].
**See the comic on xkcd {{xkcd|488}}.

===House of Pancakes===
*[[472: House of Pancakes]]
**This comic's header notes its status as a parody:
***(Today's comic is a parody of [https://www.amazon.com/House-Leaves-Mark-Z-Danielewski/dp/0375703764 House of Leaves].)
**Only on the days this comic was the newest was this header featured on the front page of xkcd for instance as seen here the day after release on [https://web.archive.org/web/20080906103932/http://www.xkcd.com/ 2008-09-06].
***But it was only on this comic. The commercial for his new t-shirt was on all the other pages, also on [https://web.archive.org/web/20080906103932/http://www.xkcd.com/ 2008-09-06] and presumably returned to the front page with the next comic. But there is a gap in the archive after this comic.
**See the comic on xkcd {{xkcd|472}}.

==Global header text==
When editing the section, list the changes chronologically with the date of the web archive link and hyperlink each date. Include an internal link to the newest comic at the time of each change and describe the modifications with relevant information. Position the last comic displaying the header text below the other data and place the most recent change at the top.

===2023-11-30 (?) - What If? is now on YouTube!===
**The text:
***What If? is now on YouTube!
***Check out the first video for the answer to
***“What if we aimed the Hubble Telescope at Earth?”
***and follow xkcd’s What If? The Video Series channel to be notified about each new video.

===2023-08-31 - What if? 2 is now available in paperback in the UK!===
*[http://web.archive.org/web/20230831200321/https://xkcd.com/ 2023-08-31]
**[[2822: *@gmail.com]] came out when the header changed.
**The image to the right stayed, but after more than a half year with no text, text was added to the left of the picture because the paper back was available in the UK.
***As opposed to the previous headers this was plain text and not a picture.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The text:
***What if? 2 is [https://xkcd.com/what-if-2/#UK now available] in paperback in the UK!
***what if? 2
**The link goes to https://xkcd.com/what-if-2/#UK, the page on xkcd about the What if? 2 book, and directing to the UK order links where there now also it a paper back version.
*This version was still up in the middle of November 2023 when this segment was updated. And it is now more than 22 month ago that the countdown began, with constant promotion of the book in the header text ever since.

===2023-02-17 - What if? 2 picture only===
*[http://web.archive.org/web/20230217185629/https://xkcd.com/ 2023-02-17]
**[[2739: Data Quality]] came out when the header changed.
**For the first time in a very long time there is no real header text. Only the small red picture with the plane and the title of the what if? 2 book in the right section of the header. As it has been since [[#2022-01-10 - Standard text with countdown|the countdown]] stopped.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The text:
***what if? 2
*This version ended on [http://web.archive.org/web/20230830064414/https://xkcd.com/ 2023-08-30], while [[2821: Path Minimization]] was on the front page, but was replaced by another What If? 2 header.

===2022-09-23 - What if? 2 Instant New York Times Bestseller===
*[https://web.archive.org/web/20220923182825/https://xkcd.com/ 2022-09-23]
**[[2675: Pilot Priority List]] was on the front page when the header changed.
***The header celebrates that the new what if? 2 book has become an instant New York Times bestseller.
**The header kept the same layout as the previous and thus still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at the plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are two lines of text, with the first line in very large bold letters.
**The text:
***what if? 2
***Randall Munroe
***What if? 2
***Instant New York Times bestseller.
***what if? 2
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
*This version ended on [http://web.archive.org/web/20230216181705/https://xkcd.com/ 2023-02-16], while [[2738: Omniknot]] was on the front page, but was replaced by another What If? 2 header,

===2022-09-13 - What if? 2 is available now===
*[https://web.archive.org/web/20220913142432/https://xkcd.com/ 2022-09-13]
**[[2672: What If? 2 Flowchart]] was released as the header changed, even though it was a Tuesday.
***The header and the comic celebrates the release of the new what if? 2 book, that came out on this day.
**The header kept the same layout as the previous and thus still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at the plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are two lines of text, with the first line in very large bold letters
**The text:
***what if? 2
***Randall Munroe
***What if? 2 is available now!
***what if? 2
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
*This thus ended the pre-release promotion of the book, that began on [[#xkcd_Header_text#2022-01-31_-_What_if.3F_2|2022-01-31]], plus of course the three weeks of [[#2022-01-10 - Standard text with countdown|countdown]] before. For a sum total of 8 months and three days.
**It will be interesting to see how long before any reference to what if? 2 will disappear from the header text.
*This version ended on [https://web.archive.org/web/20220922150042/https://xkcd.com/ 2022-09-22], but was replaced by another What If? 2 header, while [[2675: Pilot Priority List]] was on the front page.

===2022-09-12 - One day to What if? 2 comes out===
*[https://web.archive.org/web/20220912125617/https://xkcd.com/ 2022-09-12]
**This was while [[2670: Interruption]] was still up.
**The header is the same layout as the previous and thus still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at he plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are three lines of text. With the first line written in large bold letters. This also has a footnote star. And the footnote is then written to the right in smaller font over five lines of text.
**The text:
***what if? 2
***Randall Munroe
***One day* until what if? 2 comes out!
***<nowiki>*</nowiki>I'm going to spend the day with that Les Mis song stuck in my head, aren't I.
***what if? 2
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
**The foot note refers to the [[2636: What If? 2 Countdown]]. For the date where the header changed 2022-09-12 it was ''F(99) where F(N) means sing all the verses of N Bottles of Beer On the wall followed by F(N-1)'' to release day.
***It is thus for certain this song Randall mentions will now be stuck in his head.
***Les mis song, probably meaning les miserables song, as in a horrible song, he now has stuck in his head for an entire day.
**The header stayed the same until [https://web.archive.org/web/20220913134002/https://xkcd.com/ 2022-09-13].
***This was while [[2671: Rotation]] was still up, early on the release day of the new book.

===2022-09-12 - Three days to What if? 2 comes out===
*[https://web.archive.org/web/20220911102450/https://xkcd.com/ 2022-09-11]
**This was while [[2670: Interruption]] was still up.
**The header is the same layout as the previous and thus still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at he plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are three lines of text. With the first line written in large bold letters. This also has a footnote star. And the footnote is then written to the right in smaller font over five lines of text.
**The text:
***what if? 2
***Randall Munroe
***Three days* until what if? 2 comes out!
***<nowiki>*</nowiki>Assuming it's still Saturday. I'm a static png image and can't perceive time.
***what if? 2
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
**The header only stayed the same for one day and [[2670: Interruption]] was still up when it changed to the next.

===2022-09-07 - Less than one week to What if? 2 comes out===
*[https://web.archive.org/web/20220907211736/https://xkcd.com/ 2022-09-07]
**This was while [[2668: Artemis Quote]] was still up.
**The header still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at he plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are four lines of text. With the middle line written in large bold letters. This also has a footnote star. And the footnote is then written to the right in smaller font over four lines of text.
**The text:
***what if? 2
***Randall Munroe
***Less than one week* until what if? 2 comes out!
***<nowiki>*</nowiki>Oh no, now I have that song stuck in my head.
***what if? 2
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
**The foot note refers to the [[2636: What If? 2 Countdown]]. For the date where the header changed 2022-09-07 it was ''one pico-universe-lifetime'' to release day. But the next day 2022-09-08 it was ''The Baby Shark chorus for a family of 50,000 sharks''.
***It is thus for certain this song Randall mentions will now be stuck in his head.
**The header stayed the same until [https://web.archive.org/web/20220910024549/https://xkcd.com/ 2022-09-10].
***This was while [[2670: Interruption]] was up.

===2022-08-27 - Preorder What if? 2 - with image - again===
*[https://web.archive.org/web/20220827232205/https://xkcd.com/ 2022-08-27]
**[[2664: Cloud Swirls]] came out when it changed.
**The header [[#2022-08-16 - Preorder What if? 2 - with image|changed back]] to the preorder image from the previous header, when Randall's book tour ended. See the link.
*It ended on [https://web.archive.org/web/20220906191403/https://xkcd.com/ 2022-09-06].
**This was while [[2668: Artemis Quote]] was up.

===2022-08-17 - What if? 2 book tour===
*[https://web.archive.org/web/20220817161136/https://xkcd.com/ 2022-08-17]
**[[2659: Unreliable Connection]] was out when it changed.
**The header still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. Inside this there is text to the left. Then Cueball is seen flying by holding on to a single balloon (like in [[1110: Click and Drag]]). He flies over five mountain peaks with snow, with three clouds and three distant birds in front of him, as he drifts to the right, as shown with movements lines behind him. In front of him is a dark feature at the bottom of the frame. Above this is a blue square (like a button) with white text.
**The text:
***I'm going on a what if? 2 book tour!
***Click to see where
***what if? 2
****The image to the left is a link to [https://xkcd.com/events/ randall munroe: events] page on xkcd. Which at the time showed the calendar with the planned stop for his book tour, which covered the US and London.
****As always the link button in blue is not the only part of the image that is a link, as he just mentioned in the [[#2022-08-11 - Preorder What if? 2 - with image|previous header text]], and several times before...
****The right image is a link that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
*This header thus continues the promotion of the new book, which was at the time was only 27 days away (or [[2636:_What_If%3F_2_Countdown|6 dog months]]).
**It will be interesting to see how long it takes before promotion for the book disappears from the header. It may still take months.
*The header stayed the same until [https://web.archive.org/web/20220826202043/https://xkcd.com/ 2022-08-26].
**This was while [[2663: Tetherball Configurations]] was up.

===2022-08-11 - Preorder What if? 2 - with image===
*[https://web.archive.org/web/20220811055445/https://xkcd.com/ 2022-08-11]
**[[2657: Complex Vowels]] came out as it changed.
*The message in the header was not really changed, but the meaning of the text from the previous header was now written in an image, although the text did change somewhat.
**The header thus still consist of two parts. To the left the new image with an picture of the book and text. And to the right the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. Inside this to the right is the new text. To the left is a picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at he plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text.
**The text:
***what if? 2
***Randall Munroe
***Preorder what if? 2 and enter for a chance to win a comic inspired by your question! Click here to learn more. Or click wherever. This whole image is a link because html is hard.
***what if? 2
****In the left image there is a blue link font on the word "here" in click here. However the entire left image is a link to the [https://sites.prh.com/whatif2 what if 2 contest]. As explained he did not only make the word a link because html is hard! This is something Randall [[xkcd_Header_text#2014-07-23_-_what_if.3F_book_tour|often comments on]].
*****The link in the text goes to a contest page that starts with the words:
*****[https://web.archive.org/web/20220718171904/https://sites.prh.com/whatif2 Want Randall Munroe to answer you What If? question?]
*****Here above the web archive version of the link, in case the link from the text goes dead in the future.
****The right image is a link that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
**The header stayed the same until [https://web.archive.org/web/20220816124823/https://xkcd.com/ 2022-08-16].
***This was while [[2659: Unreliable Connection]] was up.

===2022-07-19 - Preorder What if? 2===
*[https://web.archive.org/web/20220719153239/https://xkcd.com/ 2022-07-19]
**[[2647: Capri Suns]] came out as it changed.
*The header looked a lot like the previous one, only part of the text changed.
**The header thus still consist of two part. To the left a line of text (split up, most likely over four lines for most users). And to the right the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The text:
***Preorder What If? 2 (all US preorders eligible) and [https://sites.prh.com/whatif2 enter our contest] for a chance to win a dedicated comic and What If blog post!
***what if? 2
****The image is a link that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
***The link in the text goes to a contest page that starts with the words:
****[https://web.archive.org/web/20220718171904/https://sites.prh.com/whatif2 Want Randall Munroe to answer you What If? question?]
****Here above the web archive version of the link, in case the link from the text goes dead in the future.
**The header stayed the same until [https://web.archive.org/web/20220810034709/https://xkcd.com/ 2022-08-10].
***This was while [[2656: Scientific Field Prefixes]] was up.

===2022-01-31 - What if? 2===
*[https://web.archive.org/web/20220201000434/https://xkcd.com/ 2022-02-01]
**[[2575: What If? 2]] came out as it changed, and then it [https://www.explainxkcd.com/wiki/images/3/36/Countdown_in_header_text_page_when_what_if_comic_came_out.png looked like this] already on 2022-01-31. But there is no archived version from that day after the header changed.
***This was what [[#2022-01-10 - Standard text with countdown|the countdown]] had been counting down to.
***An announcement that Randall had written a sequel to the first ''[[What If? (book)|What If?]]'' book, based on his blog.
**The header consist of two part. To the left a line of text (split up, most likely over three lines for most users). And to the right the window also used in the countdown, but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plan ia the book title in white text.
**The text:
***What If? 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions comes out 9/13. Preorder [https://xkcd.com/what-if-2/ here!]
***What If? 2:
****The link goes to a dedicated page on xkcd about what if? 2: the book. The image is also a link to this page.
****The entire comic that came out along with the new header text is also a link to that page.
**At the same time the [[Design_of_xkcd.com#xkcd_links|xkcd links]] in the top left section of xkcd also changed to include links to books, and especially this new book.
*It will be interesting to see how long this version of the promotion for the new books stays up. But most likely there will be promotion for the book until release, and then more after the release.
**The header stayed the same until [https://web.archive.org/web/20220718145816/https://xkcd.com/ 2022-07-18], for more than 5,5 month. This was while [[2646: Minkowski Space]] was up.
***The change was rather small, but part of the text changed. The promotion continued though.

===2022-01-10 - Standard text with countdown===
*[https://web.archive.org/web/20220110183238/https://xkcd.com/ 2022-01-10].
**[[2565: Latency]] was still up when the [[Countdown in header text]] was added.
**The text was still the standard xkcd header: xkcd updates every Monday, Wednesday, and Friday.
**But a countdown was added. This was inserted in a rectangular box, placed at the end of the standard header text.
***In some browsers the box forces the last word "Friday" to jump down to the next line.
**Inside the box the following time was displayed in the version in the link:
***20d 20h 27m
****This clock will also count down every minute, although it will return to the time at the time of archive when reloaded!
****While this was edited into this wiki the time had changed to 20d 19h 12m. So it was a very fresh download in the web archive, only about 1 hour old when it was updated to this wiki.
****The minutes change without refreshing the page, and follows this editors computers clock exactly, so it will end at 59 minutes, not at a full hour.
***It looks like it started on [https://munvoseli.github.io/xkcd-countdown/ 01-10 17:00 UTC].
****A calculation shows that this countdown will reach zero on Monday 2022-01-31 at 14:59 (2:59 PM) {{w|UTC}}.
****This will be at 9:59 (9:59 AM) in [[Randall]]'s home town
*****The last ten minutes it switched to seconds for the last minute so it made the switch 15:00 UTC 10:00 in Boston!
****From that it can be deduced that the count started at 20d 22h 0m
*****The first image on the archive thus came 1h 33m after the count began.
**At [https://web.archive.org/web/20220111153818/https://xkcd.com/ 2022-01-11] a diagonal black bar appeared in the lower left-hand corner of the countdown box.
***After that the [[Countdown in header text]] page was created and any further development on the count down will be mentioned on that page.
*It was last up on [https://web.archive.org/web/20220131124817/https://xkcd.com/ 2022-01-31] when [[2574: Autoresponder]] was on the front page.
**This archived version was when the counter was at 0d 2h 11m, and the last normal frame was already up at this time.
***It stayed like this until the [https://www.explainxkcd.com/wiki/images/1/17/Countdown_in_header_text_page_0_seconds.png counter ran out].
****Then for a few minutes the final frame, that revealed that all this was a promotion for Randall's new book what if? 2 was up [https://www.explainxkcd.com/wiki/images/4/48/Countdown_in_header_text_page_just_after_countdown.png while the Friday comic was still up].
****Then when the new Monday comic came out with the promotion for what if? 2, the header changed.

===2022-01-08 - Back to standard text===
*[https://web.archive.org/web/20220108044654/https://xkcd.com/ 2022-01-08].
**[[2565: Latency]] came out around the time the new header text appeared, on a Friday!
**The text returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**This was the first time since [[#2018-11-07 - Back to standard text|2018-11-07]] that the text had changed back to that, and at that time it lasted until 2019-02-05.
***That is 1067 days (less than a month short of three years) without the standard text! (Can it be called standard anymore?)
**It was only left in the complete standard version until [https://web.archive.org/web/20220109030513/https://xkcd.com/ 2022-01-09] when Latency was still on the front page.
***Then the next day a [[#2022-01-10 - Standard text with countdown|countdown]] was added to it.
****That was after the weekend on Monday but before the Monday comic came up.
****So only during the weekend was it normal standard header text.

===2021-12-20 - What If in stock===
*[https://web.archive.org/web/20211220211220/https://xkcd.com/ 2021-12-20].
**[[2557: Immunity]] came out around the time the new header text appeared.
**The text:
***For anyone trying to find What If? this year, it's in stock at [https://www.barnesandnoble.com/w/what-if-serious-scientific-answers-to-absurd-hypothetical-questions-randall-munroe/1118864093 Barnes & Noble], [https://m.booksamillion.com/p/What-If/Randall-Munroe/9780544272996 Books-a-Million], and [https://bookshop.org/books/what-if-serious-scientific-answers-to-absurd-hypothetical-questions-9781483041827/9780544272996 Bookshop]
**Each store name is a link to the corresponding store's page for ''[[What If? (book)|What If?]]''.
*It was last seen on [https://web.archive.org/web/20220106100957/https://xkcd.com/ 2022-01-06] when [[2564: Sunshield]] was up.

===2020-06-03 - Black Lives Matter===
*[https://web.archive.org/web/20200604003700/http://xkcd.com/ 2020-06-03].
**[[2315: Eventual Consistency]] came out as a new header text was finally inserted after almost two months without one.
**Cueball is standing to the left and speaks a single line of text: "Black Lives Matter"
**To the right is a gray link button with text: "[https://www.joincampaignzero.org/ How To Help]."
**As always, the entire image (which is only below the xkcd logo) is a link
***The button is thus not needed, but it will also work when clicking the location of the button.
**The link goes to [https://www.joincampaignzero.org/ Join Campaign Zero].
***{{w|Black Lives Matter}} is a loose, grassroots, decentralized confederation of groups and individuals advocating for racial justice. It arose in 2013 after the acquittal of {{w|George Zimmerman}}, who took the life of {{w|Trayvon Martin}}.
***Randall's featuring Black Lives Matter came on the heels of the {{w|Killing of George Floyd}} on May 25th 2020, which had sparked {{w|George Floyd protests|protest in the US}}
***Floyd died while saying "{{w|I can't breathe}}," which was already used due to other Black men's killings, the first was from the {{w|Killing of Eric Garner}}, back in 2014.
*It stayed like this until [https://web.archive.org/web/20200616114945/https://xkcd.com/ 2020-06-16] when [[2320: Millennium Problems]] was up.
**Then on [https://web.archive.org/web/20200617131438/https://xkcd.com/ 2020-06-17] the link changed to [https://blacklivesmatter.com/ Black Lives Matter]. [[2320: Millennium Problems]] was still on the front page on that day.
*On April 1st 2021 the front page header changed to mention who made the April Fools' comic.
**But this was only for this comic [[#Checkbox|Checkbox]].
**The rest of the pages kept the BLM header and it returned to this on the front page once the next comic was released on April 5th. At that time it will have been up for 13 months, making it the longest header different from the standard header.
*It was last up on [https://web.archive.org/web/20211219202204/https://xkcd.com/ 2021-12-19] when [[2556: Turing Complete]] was on the front page.
**At that time it had been up for 564 days or 1,5 year plus 16 days! This is most likely a record.

===2020-04-05 - Empty header===
*[https://web.archive.org/web/20200405042955/https://xkcd.com/ 2020-04-05].
**[[2289: Scenario 4]] came out and the header belonging to the previous comic was removed.
**But no new header was inserted. Not even the go to [[#Header text|Header text]] about the release days of xkcd.
***Since the previous header was related only to the [[:Category:April fools' comics|April fools' comic]] [[2288: Collector's Edition]], and that had stopped the promotion of the [[How To]] book, after first experiencing problems with it's release, it seems Randall forgot what he usually put in the header.
*It stayed empty like this until [https://web.archive.org/web/20200602213017/https://xkcd.com/ 2020-06-02] when [[2314: Carcinization]] was on the front page.
**So almost two month without a header. This had not happened before.

===2020-04-04 - Put together by===
*[https://web.archive.org/web/20200404014814/http://xkcd.com/ 2020-04-04].
**[[2288: Collector's Edition]] came out and the header changed.
**The text:
***Today's comic was put together by [https://chromakode.com/ Max Goodhart], [https://twitter.com/Aiiane Amber], [https://twitter.com/bstaffin Benjamin Staffin], [https://twitter.com/cotrone Kevin], [https://www.instagram.com/fading_interest/ @fading_interest], [https://twitter.com/wirehead2501 Kat], [https://twitter.com/zigdon @zigdon], and Christopher Night.
****All names have links except the last.
**It thanks those that helped Randall create this years [[:Category:April fools' comics|April fools' comic]], which had taken two extra days before it was released due to the complex nature of the comic.
*Due to the delay the next comic, [[2289: Scenario 4]], was released already the day after the Fool's comic, even though it was thus [[2289:_Scenario_4#Trivia|on a Saturday]]!
**Since this header was related only to the Fool's comic, it was thus removed from the general header, but it stayed up as [[#Collector.27s_Edition|one of]] the permanent [[#Unique_header_text|unique header texts]].
***However, when it was removed from the general header, the header was left empty.
***Unlike some other headers that stayed on a given comic, this one was on all comics for the duration of the time it stayed on the front page, see for instance the previous comic on [https://web.archive.org/web/20200403232031/https://xkcd.com/2287/ 2020-04-03].

===2020-04-02 - Technical Reasons===
*[https://web.archive.org/web/20200402234828/https://xkcd.com/ 2020-04-02].
**[[2287: Pathogen Resistance]] was up when the header changed.
*Randall turned out to, again, have problems with his complicated and interactive [[:Category:April fools' comics|April fools' comic]] for 2020.
**The text:
***Note: For technical reasons Wednesday's comic will be posted Thursday instead. Apologies for the delay!
*This finally stopped the promotion of the [[How To]] book.
**It had then been part of the header for well over a year since [http://web.archive.org/web/20190206060904/https://xkcd.com/ 2019-02-06].
*It stayed up a day longer than planed as the fool's comic, [[2288: Collector's Edition]] was first released on Friday, so the note was still up on [https://web.archive.org/web/20200403012612/https://xkcd.com/ 2020-04-03].
**[[2287: Pathogen Resistance]] thus stayed two extra day on the front page, and the third comic of that week, [[2289: Scenario 4]] was released already the day after the Fool's comic, even though it was thus [[2289:_Scenario_4#Trivia|on a Saturday]]!

===2020-01-16 - How To explores - again===
*[https://web.archive.org/web/20200116190038/https://xkcd.com/ 2020-01-16].
**[[2255: Tattoo Ideas]] was still up when the header changed.
**The ongoing promotion of the book continued but here more than three weeks after Christmas the reference to Christmas was removed.
**The header then returned to the one from before Christmas:
***[[#2019-11-22 - How To explores|How To explores]] - see that for all other details.
*It was last up on [https://web.archive.org/web/20200401221435/https://xkcd.com/ 2020-04-01] when [[2287: Pathogen Resistance]] was on the front page.
**It was the problems with [[:Category:April fools' comics|April fools' comic]] of 2020 that finally stopped the promotion of the [[How To]] book.
**It had then been part of the header for well over a year since [http://web.archive.org/web/20190206060904/https://xkcd.com/ 2019-02-06].

===2019-12-02 - Into Science===
*[https://web.archive.org/web/20191202223745/https://xkcd.com/ 2019-12-02].
**[[2236: Is it Christmas?]] came out when the header changed. Fitting as the change is about Christmas list.
**Still promoting the new [[How To]] book, continuing to make the image a link to the [https://xkcd.com/how-to/ How To book] page on xkcd.
***The links below to order are the same as in the previous header.
***Actually most of the header stays the same with the same four images and the same layout. But the text above has changed completely and the two main text sections between the drawings has changed but only slightly. The description of the images is thus left out, see below. Only new thing is that there are now two red circles connected with a red arrow. The first circle is around the word How To at the end of the first text with the arrow going from that circle to the second circle drawn around the picture of the book.
**The text:
***Is there someone on you Christmas list who's into science? They might like my new book '''''How To'''''
***It explores ridiculous ideas for applying scientific research to everyday problems...
***...And illustrates what would happen if you tried them.
***''Boom''
***You can get it here:
***[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound], [https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target]
*It was last up on [https://web.archive.org/web/20200115155040/https://xkcd.com/ 2020-01-15] when [[2255: Tattoo Ideas]] was on the front page.

===2019-11-22 - How To explores===
*[https://web.archive.org/web/20191122214439/https://xkcd.com/ 2019-11-22].
**[[2232: Hotel Room Party]] was up when the header changed. It most likely changed when the comic appeared. Earlier on that day it was the previous header over the previous comic.
**Still promoting the new [[How To]] book, here again making the image a link to the [https://xkcd.com/how-to/ How To book] page on xkcd, after it previously was a link to where to listen to the audio book.
***The links below to order returns to the same as in the header before the previous header with links to audio books, except that the link to an exclusive edition has been removed.
***The header consist of an image with text above five small drawings with two text parts in between them. To the left is the closed How To book which is black with a blue readable title, How To, and unreadable white text below this as well as below the unreadable blue author name, which are below the image. The image shows Cueball putting in a light-bulb with drones under each foot while Megan, holding a ladder, and White/Black Hat are looking up at him. To the right of the book is a drawing of Ponytail pole-vaulting with two black helium filled balloons. Next to her is the first text segment. Then after that is the drawing, seen before in the header text, of a truck towing a house up a steep hill. This truck goes above the second text segment, with Cueball somersaulting above the text. Furthest right, above and just right of the text is an explosion with the sound written inside. Below the header image is some black text and then the links to where to get it as regular blue link text.
**The text:
***My new book '''''How To''''' explores the science behind spacecraft heat shields, butterfly metabolisms, and land border surveys...
***...By imagining ridiculous ideas for applying the research to you everyday life...
***...And illustrating what would happen if you tried them.
***''Boom''
***You can get it here:
***[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound], [https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target]
*It was last up on [https://web.archive.org/web/20191201191025/https://xkcd.com/ 2019-12-01] when [[2235: Group Chat Rules]] was on the front page.

===2019-11-06 - Audio clip===
*[https://web.archive.org/web/20191106204314/https://xkcd.com/ 2019-11-06].
**[[2224: Software Updates]] was still up when the header changed, but the first archive version was first from after the next comic came out [[2225: Voting Referendum]].
**Still promoting the new [[How To]] book, here making the image a link to the How To book on Penguin Random House's audio book, where an audio clip read by Wil Wheaton can be sampled.
***The links below to order have now changed to those with audio books.
***The header consist of an image with text, with a "blue link", above the How To book that is being folded out from closed; to partially open; to opened up on two full pages; this takes three images. The closed book is the black book with a blue readable title, How To, and unreadable white text below this as well as below the unreadable blue author name, which are below the image. The image shows Cueball putting in a light-bulb with drones under each foot while Megan, holding a ladder, and White/Black Hat are looking up at him. The partly open book still has this cover partly visible, but unreadable, as well as come unreadable text in the open side. The open book shows two pages with lots of unreadable text and three figures (maybe one is a table). Next to the open book there is an arrow to the right pointing at an audio icon with three audio lines in front. Below the header image are the links as regular text.
**The text:
***You can click here to hear a clip from the audio version of '''''How To''''', read by Wil Wheaton.
***[https://books.apple.com/us/audiobook/how-to-absurd-scientific-advice-for-common-real-world/id1475319694 Apple], [https://www.audiobooks.com/audiobook/how-to-absurd-scientific-advice-for-common-real-world-problems/369279 Audiobooks], [https://www.audible.co.uk/pd/How-To-Audiobook/1473680360?qid=1574679523&sr=1-1&pf_rd_p=c6e316b8-14da-418d-8f91-b3cad83c5183&pf_rd_r=DX3EZ14M14CFQPP9GHJY&ref=a_search_c3_lProduct_1_1 Audible], [https://play.google.com/store/books/details/Randall_Munroe_How_To?id=LzSGDwAAQBAJ Google Play], and [https://libro.fm/audiobooks/9780525635680 Libro.fm]
**The entire image is a link to the [https://www.penguinrandomhouseaudio.com/book/576760/how-to/ How To book on Penguin Random House] page, where the audio clip can he played.
***As always it is the entire picture that is a link, and not only the blue underlined text that says click here!
*It was last on the archive on [https://web.archive.org/web/20191122044456/https://xkcd.com/ 2019-11-22] when [[2231: the Time Before And After Land]] was on the front page. But it was most likely still up when [[2232: Hotel Room Party]] came out. But then changed during the next day.

===2019-10-02 - Horse vs football team===
*[https://web.archive.org/web/20191002005854/https://xkcd.com/ 2019-10-02].
**[[2210: College Athletes]] was up when the header changed.
**Still promoting the new [[How To]] book, but seeing this is no longer close to the release day the focus has changed. This time the image seems to be from one of the How To explanations in the book.
***The links below to order are the same as the previous header.
***But new text is added after the links to promote two events with Randall in New York the two days after this header came up.
****These links disappeared after a week leaving only the picture and the link to buy the book. See below.
***The header consist of an image with Cueball riding bareback on a horse. He comes from the left holding an American football. Running towards him from the right are eight American football players with helmets with three stars on the back of the helmet. Two of the players at the back are almost hidden by players in front of them. Beneath them is a line of text that belongs to the image, the period at the end of the sentence hangs in height with the center line of the last letter E... Then below the image follows the link and promotion of the NY events, these are written in regular.
**The text:
***My new book ''How To'' is out now! You can get it here.
***[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [https://www.barnesandnoble.com/w/how-to-randall-munroe/1130494832?ean=9780525686910#/ B&N Exclusive Edition], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound], [https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target] I'll be at New York Comic Con! I'm giving [https://www.newyorkcomiccon.com/Explore/Panels/Panels-And-Screenings/#/event/how-todo-anything-with-randall-munroe-creator-of-xkcd a talk on Thursday], and on
***Friday [https://smbc-comics.com/ Zach Weinersmith] and I will be hosting [https://www.caveat.nyc/event/how-to--absurd-scientific-advice-for-common-real-world-problems-10-4-2019 an event at Caveat NYC].
**The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
***The link to Target still seems to go the main page rather than to [https://intl.target.com/p/how-to-by-randall-munroe-hardcover/-/A-76508342 their How To book page]... Probably a still undiscovered error on Randall's part?
*This header changed, but so slightly that the changes will only be mentioned here rather than in a new section:
**The first link was last active on [https://web.archive.org/web/20191004014438/https://xkcd.com/ 2019-10-04]
**Then the day after only the second link remained from [https://web.archive.org/web/20191005041539/https://www.xkcd.com/ 2019-10-05]. [[2211: Hours Before Departure]] came out when it changed.
***But the text of this link changed as it had been a continues text from one to the other link. Also it was not entirely on it's own line, thus not as with the first link whose text was directly connected to the line with the links to buy the book.
***The new text of that link was:
****[https://smbc-comics.com/ Zach Weinersmith] and I will be hosting [https://www.caveat.nyc/event/how-to--absurd-scientific-advice-for-common-real-world-problems-10-4-2019 an event] Friday night at Caveat NYC!
****The last link was the same, but now it only covered two words not the entire end of the sentence.
***This other link was last active on [https://web.archive.org/web/20191007042707/https://xkcd.com/ 2019-10-07].
**And then the last link was gone by [https://web.archive.org/web/20191008053609/https://xkcd.com/ 2019-10-08], when [[2212: Cell Phone Functions]] came out.
*It ended on [https://web.archive.org/web/20191105164001/https://xkcd.com/ 2019-11-05] when [[2224: Software Updates]] was up.

===2019-09-30 - Tons of fun===
*[https://web.archive.org/web/20190930234245/https://xkcd.com/ 2019-09-30].
**[[2209: Fresh Pears]] was up when the header changed.
**Still promoting the new [[How To]] book, but seeing this is no longer close to the release day the focus has changed to how much fun it was for Randall to write it and how proud he is of the result. Randall, as Cueball, is saying this in the new header image.
***The links below to order are the same, except a new has been added at the end.
***The header consist of an image with Cueball standing to the left of the book, shown as tall as he is. The book is opened up on two pages with lots of unreadable text as well as three drawings, only one of these, with a circle diagram, can clearly be seen. Cueball is speaking, and the text is above him and the book. Two words are blue with a line under as if they where a link. But as always the entire image is a link. Beneath the image is the links on where to order the book.
**The text:
***Writing my new book '''''How To''''' was tons of fun and I'm so proud of the result. It's out now-Click Here to order!
***Order: [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [https://www.barnesandnoble.com/w/how-to-randall-munroe/1130494832?ean=9780525686910#/ B&N Exclusive Edition], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound], [https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target]
**The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
***The new link to Target seems to go the main page rather than to [https://intl.target.com/p/how-to-by-randall-munroe-hardcover/-/A-76508342 their How To book page]... Probably an error on Randall's part.
*It ended on October 2nd while [[2210: College Athletes]] where up. But there is no archived versions from the 1st of October and the one from the 2nd is with the next version. But the editor of this was making changes to the explanation of College Athletes before the next header change came along.

===2019-09-11 - How To available===
*[https://web.archive.org/web/20190911053115/https://xkcd.com/ 2019-09-11].
**[[2200: Unreachable State]] was still up when the header changed.
**The release day part of the promotion was changed to telling that the new [[How To]] book was available. With teasers about what is in the book below the heading. On either side of the text a picture of the book is still shown. Also the links below changed, adding three new and removing one old.
***The header consist of an image with the book shown both left and right of some text. Both books have blue title and author name, and white unreadable title and white drawing of Cueball flying on two quadcopters to put in a light-bulb in a ceiling lamp, while White/Black? Hat is watching together with Megan, who is holding a ladder. Beneath the image is the links on where to order it.
***Between the two books are two sections of text above each other, the lover with smaller font.
**The text:
***How To is available now!
***Learn how to open bottles with nuclear weapons and how to be on time for meetings by altering the Earths rotation. The book also features advice from real-life experts including Chris Hadfield and Serena Williams.
***Order: [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [https://www.barnesandnoble.com/w/how-to-randall-munroe/1130494832?ean=9780525686910#/ B&N Exclusive Edition], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible]
**The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
**{{w|Serena Williams}} is a famous tennis player who was also featured in one of the [[:Category:Book promotion|promotion comics]] for How To: [[2190: Serena Versus the Drones]]
**{{w|Chris Hadfield}} is a Canadian retired astronaut, engineer, and former Royal Canadian Air Force fighter pilot. The first Canadian to walk in space, Hadfield has flown two Space Shuttle missions and served as commander of the International Space Station.
***The new link to audible probably needs the user to be signed up, else it will go to the front page and ask yo to sign up. But from the archive the page can be seen [https://web.archive.org/web/20190923004816/https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 here].
*Up till [https://web.archive.org/web/20190922143253/https://xkcd.com/ 2019-09-22] it looked like this.
**Then on [https://web.archive.org/web/20190923145251/https://xkcd.com/ 2019-09-23] and extra link was added after Audible:
***[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target].
**[[2205: Types of Approximation]] was up when this change occurred during a weekend.
*It ended on [https://web.archive.org/web/20190929223547/https://xkcd.com/ 2019-09-29] when [[2208: Drone Fishing]] was up.

===2019-09-04 - Happy Release Day - bookstore===
*[https://web.archive.org/web/20190904051509/https://xkcd.com/ 2019-09-04].
**[[2198: Throw]] was already up when the header changed slightly, as the text below Happy release day changed.
*Most of the header stayed the same as the [[#2019-09-03 - Happy Release Day - calendar|day before]], but the reference to the Gregorian/Julian calendar was changed.
**The header consist of an image with the book shown both left and right of some text.Both books have blue title and author name, and white unreadable title and white drawing of Cueball flowing on two quadcopters to put in a light-bulb in a ceiling lamp, while White/Black? Hat is watching together with Megan comes who is holding a ladder. Beneath the image is the link on where to order it, now the preorder has been changed to order.
***Between the two books are two sections of text above each other, the lover with smaller font and in brackets.
**The text:
***Happy How To release day!
***Available wherever books are sold.
***(Mostly bookstores, I assume but you can always try your luck at Wendy's.)
**See below for any other details.
*It ended on [https://web.archive.org/web/20190909211737/https://xkcd.com/ 2019-09-09] when [[2200: Unreachable State]] was up.

===2019-09-03 - Happy Release Day - calendar===
*[https://web.archive.org/web/20190903051503/https://xkcd.com/ 2019-09-03]
**[[2197: Game Show]] was still up when the header changed, but it was for sure to coincide with [[2198: Throw]] which came out later on the release day while it still looked like in this version.
**Randall celebrated the release day of [[How To]], coming out the day the header changed.
***The comic is also a reference to a chapter in the book on how to throw things. A very complicated interactive comic where different persons or other living things can be chosen to throw dead or living things. The trow will then be shown below with distance measured in two units, normal and special. That is if the thrower can actually manage to throw the thing.
**The header consist of an image with the book shown both left and right of some text. The two black books have red stars around them, five on the outer side of the image and 6 on the inner, the stars are mirrored around left and right book. Both books have blue title and author name, and white unreadable title and white drawing of Cueball flying on two quadcopters to put in a light-bulb in a ceiling lamp, while White/Black? Hat is watching together with Megan, who is holding a ladder. Beneath the image is the link on where to order it, now the preorder has been changed to order.
***Between the two books are two sections of text above each other, the lover with smaller font and in brackets.
**The text:
***How To Randall Munroe
***Happy How To release day!*
***(*Gregorian calendar. The Julian edition doesn't come out for 13 more days.)
***How To Randall Munroe
***Order: [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
**The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
**Most of the world uses the {{w|Gregorian calendar}}, but before it was taken into use, the {{w|Julian calendar}} was in use.
***The Julian calendar does not take into account that every 100 years a leap year should be passed as in the Gregorian calendar, and thus it is at the moment 13 days behind, as it has has this many February 29th too many. Since there should actually be a leap year every 400 year, and the last of those was 2000, then it has been 13 days since 1900, and will stay like this until 2100 when it will become 14 days.
***The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
**Already the next day the part of the header below happy release day about the Gregorian calendar changed. See [[#2019-09-04 - Happy Release Day - bookstore|above]].

===2019-08-27 - Out in a week===
*[https://web.archive.org/web/20190827082224/https://xkcd.com/ 2019-08-27].
**[[2194: How to Send a File]] was up when the header changed.
**Randall continues to promote his new book, [[How To]], coming out a week from this header.
***It is only three lines of text
**The text:
***My new book, How To, comes out next week!
***Read an exclusive excerpt about transmission [https://blog.xkcd.com/2019/08/26/how-to-send-a-file/ here].
***[Four links in gray blue are given with the first words in black:] Preorder ''How To'': [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
**Later [https://web.archive.org/web/20190827184229/https://xkcd.com/2194/ on the same day], (and here for the next day [https://web.archive.org/web/20190828095401/https://xkcd.com/ 2019-08-27] for the front page), more text and links where added, plus the order of the text was changed.
**The later text was:
***My new book, [https://xkcd.com/how-to/ How To], comes out in a week! ([https://blog.xkcd.com/2019/08/23/book-tour-and-contest-winner/ Book tour info])
***You can preorder it now to get a copy when it's released:
***[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
***You can also read an exclusive excerpt about file transfers [https://blog.xkcd.com/2019/08/26/how-to-send-a-file/ here].
**The link to the book tour also include the winner of the [[#2019-06-25 - People with books|contest]] to get Randall to add "your" city to his book tour.
***The winner was {{w|Juneau, Alaska}}.
*It ended on the release day 2019-09-03, so this was last on the page on [https://web.archive.org/web/20190902042108/https://xkcd.com/ 2019-09-02].

===2019-08-06 - Win a sketch===
*[http://web.archive.org/web/20190806052948/https://xkcd.com/ 2019-08-06].
**[[2185: Cumulonimbus]] was up when the header changed.
***Most likely the header changed when that comic came out on 2019-08-05. But the previous header was also out during that day.
**Randall continues to promote his new book, [[How To]], now making a competition where you can win a stick figure sketch of yourself. (Although only for US residents!)
***The image shows Hairy, with a cat at his feet and Megan (or Danish?) with a samurai sword. They are standing with their backs towards each other, the cat on the left, Megan facing right with the sword towards the words.
***Below the drawing are links to places to preorder the book.
**The text:
***Want to win a sketch of yourself as a stick figure? [https://blog.xkcd.com/2019/08/05/win-an-xkcd-sketch/ Click here] to find out how!
***[Four links in gray blue are given with the first words in black:] Preorder ''How To'': [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
****The entire picture is a [https://blog.xkcd.com/2019/08/05/win-an-xkcd-sketch/ link] to a [[Blag]] post: ''Win an xkcd sketch''
****That is even though only the click here part of the text is in blue, like a link.
****Cause as he often has written: I still haven't figured out HTML imagemaps, most recently in the [[#2019-07-09 - Drawings from How To|2019-07-09]] header.
*The header stayed like this until [https://web.archive.org/web/20190826062701/https://www.xkcd.com/ 2019-08-26] when [[2193: Well-Ordering Principle]] was up.

===2019-08-03 - First look inside===
*[http://web.archive.org/web/20190803222711/https://xkcd.com/ 2019-08-03].
**[[2184: Unpopular Opinions]] was up when the header changed.
**Randall continues to promote his new book, [[How To]], now stating that it comes out next month.
***Set to be released on September 3rd 2019, this update was made exactly one month before.
***The image shows text to the left of three drawings of the book: First the closed book showing the black front cover with blue and white text and white drawings, then the book is partly opened, and finally it lays opened up showing two pages, with a readable heading on the right page.
***Below the drawing are links to places to preorder the book.
**The text:
***My new book comes out next month. Click here for a first look inside!
***[On the books front cover only two thins can be read:]
****How To
****Randal Munroe.
***[These two words can also partly be read on the opening book.]
***[Only the large heading can be read on the right page of the open book:]
****How to Dig a Hole.
***[These two pages also became part of a special comic relased during the weekend when this header was up: [[Disappearing Sunday Update]].]
***[The [[Disappearing_Sunday_Update#Transcript|transcript of that comic]] describes the images in the open book.]
***[Four links in gray blue are given with the first word in black:] Preorder:[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
****The entire picture is a [https://blog.xkcd.com/2019/08/02/how-to-chapter-list-and-introduction/ link] to a [[Blag]] post: ''How To: Chapter list and introduction''.
*It stayed up like this while the special [[Disappearing Sunday Update]] came out on Sunday 2019-08-04, and was there still on Monday [ http://web.archive.org/web/20190805050812/https://www.xkcd.com/ 2019-08-05], at least during the time that the Sudan Update was still up.
**When the next comic came out late that Monday, it probably disappeared along with the Disappearing comic, but the first update with the next header is from Tuesday [http://web.archive.org/web/20190806052948/https://xkcd.com/ 2019-08-06], but the Monday comic [[2185: Cumulonimbus]] was still on the front page at that time,.

===2019-07-23 - Back to previous header===
*[http://web.archive.org/web/20190723205152/https://xkcd.com/ 2019-07-23].
**[[2179: NWS Warnings]] was up when the header changed.
*It returned to the previous header from before the ComicCon header, see [[#2019-07-10 - Adding links|2019-07-10]]
*It stayed up until [http://web.archive.org/web/20190802192259/https://xkcd.com/ 2019-08-02] while [[2184: Unpopular Opinions]] was up. The day after when it changed that comic was still up.

===2019-07-15 - ComiCon===
*[http://web.archive.org/web/20190715181016/http://xkcd.com/ 2019-07-15].
**[[2176: How Hacking Works]] was up when the header changed.
*Randall tells that he will be at ComicCon and links to his plans there.
**The text:
***Going to San Diego Comic Con this week? I'll [https://blog.xkcd.com/2019/07/15/san-diego-comic-con/ see you there]!
****The link is to a [[Blag]] post about his plans for the ComicCon
**Randall appeared in a couple of panels, and gave a talk.
**Finally he also handed out signed copies of his new [[How To]] book more than a month before official release.
***So still promoting the book, also in this header...
*It stayed up until [http://web.archive.org/web/20190722192637/https://www.xkcd.com/ 2019-07-22] the day after the ComiCon ended, while [[2178: Expiration Date High Score]] was up.
**Then it returned to the previous header from before the ComicCon announcement when [[2179: NWS Warnings]] came out.

===2019-07-10 - Adding links===
*[http://web.archive.org/web/20190710165920/https://xkcd.com/ 2019-07-10].
**[[2173: Trained a Neural Net]] was still up when the header changed slightly from that fro the day before.
**Only change was that beneath the picture, see [[#2019-07-09 - Drawings from How To|2019-07-09]], there is now a list of four links to companies where the book can be preordered.
**The extra text:
***[Four links in gray blue are given with the first word in black:] Preorder:[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
*Note that the day after this change, [https://web.archive.org/web/20190711172451/https://xkcd.com/ 2019-07-11], a link to [[How To]] was added to the [[Design_of_xkcd.com#xkcd_links|links]] in the top left corner of xkcd.
*The header stayed like this until [http://web.archive.org/web/20190714175710/https://xkcd.com/ 2019-07-14] when [[2175: Flag Interpretation]] was up. When it changed the day after [[2176: How Hacking Works]] was up.

===2019-07-09 - Drawings from How To===
*[http://web.archive.org/web/20190709162102/https://xkcd.com/ 2019-07-09].
**[[2173: Trained a Neural Net]] was up when the header changed.
**Randall continues to promote his new book, [[How To]].
***The image shows a small picture of his book with text on either side.
***Below are what appears to be three drawings from the book. [[Ponytail]] pole vaultig with three baloons in one hand, then text, then a truck with a house behind it speeding fast up a hill then text and finally [[Cueball]] somersaulting towards an explosion.
***To the right there is a big blue button to click for preorder, with text below.
**The text:
***New book [Arrow points to book. Title can be read: How To]
***How To: Absurd Scientific Answers to Common Real-world Problems
***It's a guide to bad ways to do things...
***...And what would happen if you tried them.
***''Boom''
***Click here to preorder
***Or click anywhere. I still haven't figured out HTML imagemaps.
****The entire picture is a [https://xkcd.com/how-to/ link] to the official [[How To]] page on xkcd: https://xkcd.com/how-to/
****See [[1572: xkcd Survey]] where Randall mentions that he cannot make imagemaps.
*It stayed up like this only for a day, then an extra line of links was added the day after while the same comic was still up, see [[#2019-07-10 - Adding links|2019-07-10]].
**But the general header stayed up first for five days, and then it returned again for 10 more days after a break to announce a [[#2019-07-15 - ComiCon|ComiCon visit]].
**So a total of 16 days with this drawing.

===2019-06-25 - People with books===
*[http://web.archive.org/web/20190625190843/https://xkcd.com/ 2019-06-25].
**[[2167: Motivated Reasoning Olympics]] was up when the header changed.
**Randall continues to promote his new book, [[How To]], and his book tour.
***The image now shows 15 people standing side by side each holding a book up in front of them with unreadable titles.
***From left: [[Megan]], [[Cueball]], a man with blonde hair, [[Jill]], [[Blondie]], [[Hairy]], another Hairy, [[White Hat]], a kid with curly hair, [[Hairbun]], another Cueball, another Megan, a guy with a knit cap, [[Ponytail]], and [[Beret Guy]].
***Above them is a text message.
**The text:
***Want to bring me to your town for my '''''How To''''' book tour? Click to find out how to enter the challenge!
****The entire picture is a [https://blog.xkcd.com/2019/06/10/book-tour-announcement/ link] to the official book tour announcement posted on the [[Blag]], with all cities and dates listed with details.
****In the link it is explained how to enter a competition on how to bring Randall to your city.
****Make a story using only book titles and get the books used to be held up by different individuals.
****A longer sentence will improve your chances.
*****This is indeed what this header picture shows.
*The header stayed like this until [http://web.archive.org/web/20190708155517/https://xkcd.com/ 2019-07-08] when [[2172: Lunar Cycles]] was up. When it changed the day after [[2173: Trained a Neural Net]] was up.

===2019-06-15 - Adding dates===
*[http://web.archive.org/web/20190615100645/http://xkcd.com/ 2019-06-15]
**[[2163: Chernobyl]] was up when the header changed.
**Randall only made a small change to the one that had been up for four days at this time.
**The text only changed by adding a line below the first line:
***Announcing the '''''How To''''' book tour:
***[Click here for dates and tickets]
****The rest of the header is exactly the same as on [[#2019-06-11 - Book tour|2019-06-11]], except everything is a bit smaller to make room in the same place for the extra line.
****The link is not located on the blue part of the text and it was already there before this update.
****Best guess is that not many clicked through and Randall then made it obvious that there was a link.
****The entire picture is a [https://blog.xkcd.com/2019/06/10/book-tour-announcement/ link] to the official book tour announcement posted on the [[Blag]], with all cities and dates listed with details.
****Randall has previously made it clear, in [[1572: xkcd Survey]], that he knows how to make an image a link, but not how to put the link only where he says to click. But it is easier to make a place for people to click than tell them this...
*The header stayed like this until 2019-06-25, when it changed while [[2167: Motivated Reasoning Olympics]] was up. But this one was still up when that comic came out the day before [http://web.archive.org/web/20190624162740/https://xkcd.com/ 2019-06-24].

===2019-06-11 - Book tour===
*[http://web.archive.org/web/20190611031920/https://xkcd.com/ 2019-06-11]
**[[2161: An Apple a Day]] was up when the header changed.
***'''Note''' when this change happened two new links was added to the [[Design_of_xkcd.com#xkcd_links|xkcd links]] section of xkcd.
**Randall changed the header text to announce the official book tour for his newest book ''[[How To]]'' to be released 3 months later.
**The text:
***Announcing the '''''How To''''' book tour:
***[Below this header is a map of the mainland USA with 14 labeled black dots indicates the 14 cities that the book tour will take Randall to. One red dot with five red question marks above is located beneath the map to the left, indicating a 15th city to be chosen in a contest. Above the map to the right is a small picture of the book with the blue title on the black cover. Above the book is the release date and with an arrow pointing down to the book.]
***September 3rd
***How to
***Seattle
***Portland
***San Francisco
***Santa Cruz
***Los Angeles
***Salt Lake City
***Kansas City
***Ann Arbor
***Cincinnati
***Louisville
***Cambridge
***New York
***D.C.
***Raleigh
***????? (Chosen by readers)
***[The entire picture is a [https://blog.xkcd.com/2019/06/10/book-tour-announcement/ link] to the official book tour announcement posted on the [[Blag]], with all cities and dates listed with details.]
****In the link it is explained how to enter a competition on how to bring Randall to your city.
****Make a story using only book titles and get the books used to be held up by different individuals.
****Only US cities can apply.
**The header only stayed exactly like this for three days, and was still up on [http://web.archive.org/web/20190614094729/https://xkcd.com/ 2019-06-14] when [[2162: Literary Opinions]] was on the front page.
***Then it changed slightly to indicate that the picture was a link which was not clear before. See above.

===2019-05-17 - Back to previous header===
*[http://web.archive.org/web/20190517103928/https://xkcd.com/ 2019-05-17]:
**[[2150: XKeyboarCD]] was still up when the header changed.
*It changed back to the exact same heading as before the one with Google reader here below.
**See [[#2019-02-06 - How to book|2019-02-06]] below for all details.
**It stayed up for more than three weeks and was still up on [http://web.archive.org/web/20190610055519/https://www.xkcd.com/ 2019-06-10], while [[2160: Ken Burns Theory]] was still up on the day the next comic [[2161: An Apple a Day]] was to be released (where the new header could be found at least the next day, but maybe from the release of that comic?). Then it changed to announce the book tour for his new book.

===2019-04-23 - Google Reader===
*[http://web.archive.org/web/20190423155458/https://xkcd.com/ 2019-04-23]:
**[[2140: Reinvent the Wheel]] came out when it changed, ending a more than two and half month long [[#2019-02-06 - How to book|promotion]] of Randall's new book [[How To]].
**Randall changed the header text to ask if the reader still mourned the loss of {{w|Google Reader}} which closed on 2013-07-01, almost 6 years before this comic..
***He offers the possibility to sign up to receive the newest comic by e-mail.
**The comic may have relation to this, as some where using Google reader for different purposes when they closed it, without any chance of [https://www.google.com/reader/about/ getting your data out].
***The comic "Reinvent the Wheel" mentions that using external dependencies carry risks, such as Google closing down a feature. given the fact that the comic came out as the header changed it is probably not a coincidence.
**The text:
***Still mourning the demise of Google Reader? You can sign up to get new comics delivered by email [https://xkcd.com/newsletter/ here].
**The link is to https://xkcd.com/newsletter, where it is possible to submit your e-mail address and press a subscribe button.
***the following text is written above it:
***To receive the comic and news postings in your inbox, subscribe here.
**It stayed up for more than three weeks and was still up on [http://web.archive.org/web/20190516100403/https://xkcd.com/ 2019-05-16], when [[2150: XKeyboarCD]] was up. Then it changed back to the promotion of his new book.

===2019-02-06 - How to book===
*[http://web.archive.org/web/20190206060904/https://xkcd.com/ 2019-02-06]:
**[[2107: Launch Risk]] was up at the time when it changed, having been up since Monday the 4th of February.
***Here it can be seen being on the front of xkcd on [http://web.archive.org/web/20190205050302/https://xkcd.com/ 2019-02-05], without the new text. This was also the last time the standard header text was used in several months.
***[[2108: Carbonated Beverage Language Map]] came up later on the day the header changed.
**Randall changed the header text to promote his newest book ''[[How To]]'' to be released 7 months later.
***He added an image of the book with large text next to it regarding the release and links on how to preorder it.
***There was no direct relation to the comics released at the time, except of course that he kind of launched his new book with all the risk it involves, while having a comic called launch risk up. It was though a very different and more real type of launch risk (of a human carrying space rocket) in the comic.
**The text:
***[The book is shown to the left as a black rectangle with large blue text and smaller gray text. On the book cover, in white drawings, are seen Megan with a ladder and either Black or White Hat (hard to say on black background). Both are looking up on Cueball who is floating in the air with a quadcopter beneath either leg, trying to plug in an electric light bulb in a naked lamp hanging down near him. It seems he has already removed the broken light bulb, as he has one in both hands. And now he tries to put in the new one. He could have let Megan use the ladder...]
***[The header in blue above it all:] How To.
***[Sub header in gray to the left of Cueball:] Absurd Scientific Answers to Common Real-world Problems
***[Author name in blue below the drawing:] Randall Munroe
***[Sub header to this below in gray:] Creator of xkcd
***[Sub header to this below in gray:] Author of what if? and Thing Explainer
***[Next to this book image are the following text:]
***[Large heading:] HOW TO
***[Normal size sub header:] Absurd Scientific Answers to Common Real-world Problems
***[In smaller gray font below:] Available September 3, 2019.
***[Four links in gray blue are given with the first word still in gray:] Preorder:[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
**It stayed up for more than two and a half month and was still up on [http://web.archive.org/web/20190422030324/https://xkcd.com/ 2019-04-22], when [[2139: Email Settings]] was up. Then it finally changed to a new header without going back to the standard.

===2018-11-07 - Back to standard text===
*[http://web.archive.org/web/20181107144453/https://www.xkcd.com/ 2018-11-07]
**The text returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**It stayed like this until [[2107: Launch Risk]] was up on [http://web.archive.org/web/20190205050302/https://xkcd.com/ 2019-02-05], so two days less than three months.
***After this it did not return to the standard text for almost three years, but just short of a month before the third year without it, it returned on [[#2022-01-08 - Back to standard text|2022-01-08]].

===2018-11-06 - Election Day===
*[http://web.archive.org/web/20181106122850/https://xkcd.com/ 2018-11-06]:
**[[2068: Election Night]] (on election day the day after this comic was released).
***It added a larger comic above the two links from the previous header. Those links of the previous header text was still up the day before [http://web.archive.org/web/20181105105855/https://xkcd.com/ 2018-11-05], when [[2067: Challengers]] was still up.
**Randall changed the xkcd header once more to try to make more people vote, and in this case help others to vote.
***Once again directly related to the new comic about election night.
**The text:
***[A line of altering blue and red stars, blue first and last of two rows of nine starts around of the heading:]
***Election Day!
***[Below Black Hat and Ponytail to the left and Megan to the right of Cueball is checking their smart phones. Cueball is addressing the reader:]
***Cueball: The biggest thing you can do th help is to check in with friends and family and make sure they know when and where they're voting.
***[Below these four characters there is the following text with two arrows pointing left and right. Both are turning up to text/links on either side of the four:]
***Use these links to answer questions
***[To the left:] Where and how to vote: [https://www.vote.org/ Vote-org]
***[To the right:] What's on your ballot: [https://www.ballotready.org/ BallotReady.org]
***[Below was the two links from the previous header:]
***Find out where to vote: [https://www.vote.org/ vote.org].
***See what's on your ballot: [https://www.ballotready.org/ BallotReady.org]
**It was only up one day and thus on ended the day after [http://web.archive.org/web/20181107144453/https://www.xkcd.com/ 2018-11-07] when the next comic [[2069: Wishlist]] came out.
***The text then returned to the standard xkcd header: xkcd updates every Monday, Wednesday, and Friday.
****It stayed like this until [[2107: Launch Risk]] was up on [http://web.archive.org/web/20190205050302/https://xkcd.com/ 2019-02-05].

===2018-11-02 - Where to vote===
*[http://web.archive.org/web/20181103021059/https://xkcd.com/ 2018-11-02]:
**[[2067: Challengers]] (on the Friday, it was released).
***It added another link to the previous header text. That text was still up the day before on Thursday [http://web.archive.org/web/20181102015102/https://xkcd.com/ 2018-11-01].
***That was while comic [[2066: Ballot Selfies]] was still up.
**Randall changed the xkcd header to let people know who is on their voting ballot, and as before there is also a link on how to register for voting.
***This is also directly related to the new comic that came out that day, about helping people to decide who to vote for, i.e. who is on their ballot.
**The text:
***Find out where to vote: [https://www.vote.org/ vote.org].
***See what's on your ballot: [https://www.ballotready.org/ BallotReady.org]
**This was done at this moment because the {{w|United States midterm election}} was held on {{w|United States elections, 2018|Tuesday, November 6, 2018}}, four days after the release of this comic.
**It was still up the day before the election day, [http://web.archive.org/web/20181105105855/https://xkcd.com/ 2018-11-05], and then it changed with the next comic.

===2018-10-22 - Register for voting===
*[http://web.archive.org/web/20181022120935/https://xkcd.com/ 2018-10-22]:
**[[2061: Tectonics Game]] (on a Monday, the 3rd day after release of this Friday comic)
***The standard text was still up Sunday [http://web.archive.org/web/20181021141446/https://xkcd.com/ 2018-10-21].
***The comic [[2062: Barnard's Star]] was released later that day.
**Randall changed the xkcd header to try to get people to register for voting.
**The text:
***Check your registration and find your polling place at [https://www.vote.org/ vote.org].
**This was done at this moment because the {{w|United States midterm election}} was held on {{w|United States elections, 2018|Tuesday, November 6, 2018}}, about two weeks after the release of this comic.
***It is generally believed that many of those not voting would have chosen democrats on election day, and thus Randall has an interest in getting as many as possible to register, see [[1756: I'm With Her]] (apart from the fact that he also most likely thinks that it is important to use the right to vote).
**It ended on [http://web.archive.org/web/20181103021059/https://xkcd.com/ 2018-11-02], when [[2067: Challengers]] came out.
***It was still there while [[2066: Ballot Selfies]] was still up the day before on [http://web.archive.org/web/20181102015102/https://xkcd.com/ 2018-11-01].

===2018-09-13 - NY votes today===
*[http://web.archive.org/web/20180913133544/https://xkcd.com/ 2018-09-13]
**[[2045: Social Media Announcement]] (the day after the release of the comic.)
***It was not up when the comic was released on [http://web.archive.org/web/20180912131437/https://xkcd.com/ 2018-09-12].
**It was a short lived reminder that NY votes today below the usual standard text.
**The text:
***xkcd updates every Monday, Wednesday, and Friday.
***NY votes today! Find your polling place [https://voterlookup.elections.ny.gov/ here]. (Zephyr Teachout for AG!)
**It ended with [[2046: Trum-]], the very next comic, on [http://web.archive.org/web/20180914175605/https://xkcd.com/ 2018-09-14], returning to the standard text.

===2017-11-26 - Christmas gifts===
*[http://web.archive.org/web/20171126130857/http://xkcd.com/ 2017-11-26]
**[[1920: Emoji Sports]] had been up two days [http://web.archive.org/web/20171125125648/https://xkcd.com/ 2017-11-25] before the message changed from the normal version. But it changed the day before the next comic came up.
***It was changed to a commercial for Christmas shopping with a code for getting 5$ of the price with a codes for different online shops.
**The text:
***To anyone looking for Christmas gifts: Until Monday you can get $5 off
***[https://www.amazon.com/What-International-Scientific-Hypothetical-Questions/dp/0544456866 What If?] and [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Thing Explainer] on Amazon with coupon code GIFTBOOK17.
***At Barnes & Noble, until Sunday you can get 20% off [https://www.barnesandnoble.com/w/what-if-serious-scientific-answers-to-absurd-hypothetical-questions-randall-munroe/1118864093 What If?] and [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432 Thing Explainer] using code GIVETHANKS.
**It was only up a few days and ended with [[1922: Interferometry]] on [http://web.archive.org/web/20171130150053/http://xkcd.com/ 2017-11-30] where it returned to the standard text.
***But it was still up when the comic in between [[1921: The Moon and the Great Wall]] was up on [http://web.archive.org/web/20171129140033/http://xkcd.com/ 2017-11-29].

===2017-09-22 - Visiting the UK===
*[http://web.archive.org/web/20170922232616/https://xkcd.com/ 2017-09-22]:
**[[1893: Thread]] (with its release).
***It was not up on the previous comic [[1892: USB Cables]], on the day they changed [http://web.archive.org/web/20170922025204/https://xkcd.com/ 2017-09-22].
**It was an announcement that Randall would visit the UK next week.
**The text:
***I'll be visiting the UK next week! You can join me in London from September 30-October 2 (at [https://live.newscientist.com/speakers/randall-munroe New Scientist Live], [http://www.rigb.org/whats-on/events-2017/october/public-lunchtime-talk--randall-munroe The Royal Institution], and [http://www.intelligencesquared.com/events/randall-munroe-on-making-complicated-stuff-simple/ Intelligence Squared]), then from October 3-6 in [https://www.stpetersyork.org.uk/public_lectures/randall_munroe_thing_explainer York], [https://www.eventbrite.co.uk/e/thing-explaining-with-randall-munroe-tickets-37832289396 Edinburgh], [https://www.toppingbooks.co.uk/events/ely/randall-murray-thing-explainer/ Cambridge and Ely], [https://www.eventbrite.co.uk/e/randall-munroe-book-signing-thing-explainer-tickets-38041072873 Oxford], and [http://www.cheltenhamfestivals.com/literature/whats-on/2017/randall-munroe/ Cheltenham].
**Ended with [[1900: Jet Lag]] on [http://web.archive.org/web/20171010045802/https://xkcd.com/ 2017-10-10] when the text returned to normal.
***But it was still up the day before with [[1899: Ears]] on [http://web.archive.org/web/20171009040109/https://xkcd.com/ 2017-10-09].

===2017-07-31 - Thank you===
*[http://web.archive.org/web/20170731021227/https://www.xkcd.com/ 2017-07-31]:
**[[1869: Positive and Negative Reviews]] (3rd day after release of this Friday comic)
***The comic [[1870: Emoji Movie Reviews]] was released later that day.
***Megan is holding hand with Cueball and next to them is two words above each other: Thank you.
***The image is also a link.
****The link goes to [http://web.archive.org/web/20170801042453/https://www.nytimes.com/interactive/2017/07/25/us/politics/senate-votes-repeal-obamacare.html How Each Senator Voted on Obamacare Repeal Proposals], an article showing the senate votes. (here in an archived version).
**Ended with [[1872: Backup Batteries]] on [http://web.archive.org/web/20170804152509/https://xkcd.com/ 2017-08-04], but was still up when [[1871: Bun Alert]] was up on [http://web.archive.org/web/20170803124342/https://xkcd.com/ 2017-08-03].

===2017-07-25 - Vote against health care bill===
*[http://web.archive.org/web/20170725103104/https://xkcd.com/ 2017-07-25]:
**[[1867: Physics Confession]] (2nd day after release of the comic, it was not up on the first day: [http://web.archive.org/web/20170724095252/https://xkcd.com/ 2017-07-24]).
**Randall modified the xkcd header to ask readers to support voting against Donald Trump's new health care bill.
***The header was replaced with an image which is available in an archived version [https://web.archive.org/web/20170726150959im_/https://imgs.xkcd.com/notes/call-senate.png here].
***The image is also a link (and you can click anywhere on it to go to the link that is mentioned).
****The link goes to [http://web.archive.org/web/20170729003307/https://www.trumpcareten.org/daily TrumpCare Ten] (here in an archived version).
****Randall has previously made it clear, in [[1572: xkcd Survey]], that he knows how to make an image a link, but not how to put the link only where he says to click.
***Transcript of the image:
****[Megan is holding hand with Cueball next to three lines of large text, the same height as they are:]
****Please tell your senators to vote against this health care bill. It will hurt people.
****[After these three lines there is a phone number in a very large bold font with a line of text below:]
****202-224-3121
****Or click here for more info
****[Below the above is a gray line which is split in the middle with gray text, and below that four state names in white text inside black boxes:]
****Know anyone in these states? Ask them to call, too.
****Alaska Maine Nevada Ohio West Virginia
**Ended while [[1869: Positive and Negative Reviews]] was up on [http://web.archive.org/web/20170731164828/https://xkcd.com/ 2017-07-31], when it was replaced by a ''Thank you''.
***That comic came out already [http://web.archive.org/web/20170728124230/https://xkcd.com/ three days before] (Friday comic), but was still up on [http://web.archive.org/web/20170730141019/https://www.xkcd.com/ 2017-07-30]) when the message changed sometimes between Sunday 30th and Monday 31st (where [[1870: Emoji Movie Reviews]] was released).

===2017-01-21 - Update on previous===
*[http://web.archive.org/web/20170122003124/https://xkcd.com/ 2017-01-21]:
**[[1788: Barge]]
**It came up almost a month after Christmas but did not really change the sales pitch of the previous. It just removed the link image with the large red text, see previous version below.
**The text:
***There are [https://store.xkcd.com/collections/featured four new shirts] in [https://store.xkcd.com/ the xkcd store],
***along with [https://store.xkcd.com/collections/posters posters] and [https://store.xkcd.com/collections/everything lots of other stuff]!
**Ended with [[1867: Physics Confession]] on [http://web.archive.org/web/20170725103104/https://xkcd.com/ 2017-07-25].
***That comic came up [http://web.archive.org/web/20170724095252/https://xkcd.com/ the day before] the above version of the header appeared.
***So the first day after release it was still the T-shirt commercial.
***And it did not return to the standard version in between.

===2016-11-28 - Christmas sale===
*[http://web.archive.org/web/20161128153015/http://xkcd.com 2016-11-28]
**[[1765: Baby Post]]
**This came up in time for the Christmas sale of 2016.
**The text was
***There are [https://store.xkcd.com/collections/featured four new shirts] in [https://store.xkcd.com/ the xkcd store],
***along with [https://store.xkcd.com/collections/posters posters] and [https://store.xkcd.com/collections/everything lots of other stuff]!
***Above the text there was an image with two black t-shirts with white print on the chest. They were located at either end of a large red text written in the text type used in the comic. This text said New xkcd shirts.
***The entire image was a link to the [https://store.xkcd.com/ xkcd store].
**Ended with [[1788: Barge]] [http://web.archive.org/web/20170121114423/https://xkcd.com/ 2017-01-21]

===2016-04-23 - Back to standard text===
*[https://web.archive.org/web/20160423103108/http://xkcd.com/ 2016-04-23]
**When [[1671: Arcane Bullshit]] came out (probably 2016-04-22, but no earlier archived versions exist) the text returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**It stayed like this for more than 7 months until [[1764: XKCDE]] was up on [https://web.archive.org/web/20161128093459/http://xkcd.com/ 2016-11-28].

===2016-04-04 - Protip on Garden===
*[https://web.archive.org/web/20160404185353/http://www.xkcd.com/#5dbfbb82-fc20-11e5-8001-42010a8e000d 2016-04-04]
**Because of the complexity of the [[:Category:April fools' comics|April fools' comic]] [[1663: Garden]], Randall needed to give people some advice, hence a [[:Category:Protip|protip]] was added.
***This came in several versions, not all managed to be documented in the archive. See more in the trivia for garden regarding the [[1663:_Garden#Header_text_after_release|Header text after release]].
**The header text became a protip with the following text (the first version not documented only had the first line):
***'''Protip''': If you don't like how your garden is growing, you can click to prune it.
***You can copy the URL to share your garden. From other browsers, it will be view-only.
**When the next comic, [[1664: Mycology]], was released two days later on [https://web.archive.org/web/20160406194653/http://xkcd.com/1664/ 2016-04-06], an extra line of text was added, due to the issues caused by Garden not being on the front page {{xkcd}} but only on the numbered page {{xkcd|1663}}.
***This change was first documented on the front page the day after on [https://web.archive.org/web/20160407010635/http://xkcd.com/ 2016-04-07]
***The change was of course also on and all the other comic and thus also on the Garden comic from [https://web.archive.org/web/20160406192530/http://xkcd.com/1663/ 2016-04-06].
**Text added below the other two lines:
***Note: If you're seeing today's comic in place of your garden, change the URL from xkcd.com/#<your code> to xkcd.com/1663/#<your code>.
****This extra line was only there until next time the comic change, so last day was [https://web.archive.org/web/20160408145017/http://xkcd.com/ 2016-04-08].
**On [https://web.archive.org/web/20160408195958/http://xkcd.com/ 2016-04-08] when [[1665: City Talk Pages]] was released the extra line was removed leaving the two written first here above.
***This was also the case on the Garden comic (and all other comics) from [https://web.archive.org/web/20160408204740/http://xkcd.com:80/1663/ 2016-04-08].
**The Protip stayed in the main header text until [https://web.archive.org/web/20160422102754/http://xkcd.com/ 2016-04-22] when [[1670: Laws of Physics]] was up.
***But even though it disappeared from main header and thus from all other comic it stayed on the Garden comic, also on [https://web.archive.org/web/20160423182630/http://xkcd.com:80/1663/ 2016-04-23].
***And it has then turned out to become one of the permanent [[xkcd_Header_text#Garden|Unique header texts]].

===2016-04-04 - Back to standard text as Garden came up===
*[https://web.archive.org/web/20160404123555/http://xkcd.com/ 2016-04-04]
**For a brief period of time, when [[1663: Garden]] was finally released, the Header text returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**But this lasted less than 13 hours. (Time between the previous and next archived version is 13 hours and 7 minutes).
***As people needed guidance to the new complicated comic.

===2016-04-01 - April 1st comic - technical difficulties===
*[https://web.archive.org/web/20160401204749/https://xkcd.com/ 2016-04-01]
**When Randall had problem releasing [[1663: Garden]] several [[1663:_Garden#April_Fools.27_header_text|April Fools' header text]] arrived in short succession while [[1662: Jack and Jill]] was still up.
**Each of these where simple text.
***The first from the link abve:
****The xkcd April 1st comic is currently experiencing technical difficulties.
****Please stand by!
***The next from [https://web.archive.org/web/20160402125723/http://xkcd.com:80/ 2016-04-02] at 12:57:
****The xkcd April 1st comic is currently experiencing technical difficulties.
****Status update: Please stand by.
****Status update: This is fine. Everything is fine.
****Status update: Everything is on fire.
****Status update: Searching for calendar systems in which Saturday is April 1st.
***The next from [https://web.archive.org/web/20160402175822/http://www.xkcd.com 2016-04-02] at 17:58:
****The Friday xkcd comic is currently experiencing technical difficulties
****[Editor's note: Everything is on fire] and has been delayed until Sunday night.
**It stayed like the third version until [https://web.archive.org/web/20160404054612/http://xkcd.com/ 2016-04-04] three days after the April Fools' comic was supposed to come out, so Jack and Jill was up until it changed.
*This was what was needed to stop more than 10 months of promotion of the [[Thing Explainer]] book, see below.

===2015-12-13 - Thing Explainer is available===
*[https://web.archive.org/web/20151213194534/http://xkcd.com/ 2015-12-13]
**[[1615: Red Car]] was still up when the header changed.
***The change was that the promotion for where Randall was last week where removed and left only the promotion the book [[Thing Explainer]]:
**The text:
***Thing Explainer is available at: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
**It was last up on [https://web.archive.org/web/20160401125621/http://xkcd.com/ 2016-04-01] while [[1662: Jack and Jill]] was on the front page.
***This was the last time that Thing Explainer was [[:Category:Book promotion|promoted]] in the header text.
****The first time was [[xkcd_Header_text#2015-05-14_-_New_book_Thing_Explainer|2015-05-14]], so it had been part of the header text for almost ten and a half month. That is a record!

===2015-12-05 - Thing Explainer is available and Next week===
*[https://web.archive.org/web/20151205070539/http://xkcd.com/ 2015-12-05]
**[[1612: Colds]] was up when the header changed.
***This was also at this time the [[2015-11-24 - Pages from my new book Thing Explainer|previous header texts image] was moved below the comic.
**Randall goes back to a simple promotion of the book [[Thing Explainer]] listing where to boy it.'
***But he adds a line about where he will be next week, first to a book shop on Illinois and then later in Toronto, where the host was {{w|Ryan North}} from [https://qwantz.com/ Dinosaur comics], one of the [[Design_of_xkcd.com#Comics_I_enjoy|comics Randall enjoys]].
**The text:
***Thing Explainer is available at: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
***I'll be in [https://web.archive.org/web/20151211002159/http://www.andersonsbookshop.com/event/naperville-reads-randall-munroe Naperville, IL] and [https://web.archive.org/web/20151205205714/http://www.eventbrite.ca/e/indigo-exclusive-randall-munroe-tickets-18694384407 Toronto, ON] (with [https://qwantz.com/ Ryan North]!) next week.
**It was last up on [https://web.archive.org/web/20151212133400/http://xkcd.com:80/ 2015-12-12] while [[1615: Red Car]] was on the front page.

===2015-11-24 - Pages from my new book Thing Explainer===
*[https://web.archive.org/web/20151203234149/http://xkcd.com/ 2015-12-03]
**[[1611: Baking Soda and Vinegar]] was still up when the header changed.
***This was a special one comic header text consisting of a large image with pages and excerpts from the book [[Thing Explainer]].
***The image was larger than most comics, and took away the focus of today's comic.
***So already two days after, when [[1612: Colds]] was released, the image was relegated to the being below the comic, but inside the [[Design_of_xkcd.com#Main_comic|main comic]] segment, thus not a part of the [[Design_of_xkcd.com#Bottom_segment|bottom segment]].
****But it was displayed in the header for all comics, here [https://web.archive.org/web/20151204030024/http://xkcd.com/1609/ an example] from the comic released two comics before 1611, [[1609: Food Combinations]].
****See more (and the image) [[Thing_Explainer#Promotion_at_the_xkcd_home_page|here]] on the page for Thing Explainer.
**Description of the image:
***At the top are shown four pages from the book. Two mainly blue, left and right, with white text and large images and between them two mainly white pages with blue text and smaller images. None of the text is readable, but the two blue pages pictures can be understood even in this size.
****The first page is number 2 about an animal cell: ''Tiny bags of water you’re made of''. It shows a detailed drawing of a human cell, with text at the top, and then several labels with text beneath that have arrows pointing to different parts of the cell.
****The second page is number 31 about the cockpit of an airplane: ''Stuff you touch to fly a sky boat''. It shows the inside of a cockpit with view out of the four windows, with lots of buttons in the ceiling, and blue screens and instruments at the bottom. Out the windows can be seen clouds and Cueball hanging from a balloon (a reference to [[1110: Click and Drag]]).
*****A zoom in on this page is shown beneath the four pages, see more below.
****The third page is page 27. What is on this page is a bit difficult to see, as there are no big drawings with clear meaning. It is the second page in a two page section on Data centers, with the second page focusing on the Computer: ''Computer building''. The pictures shows the data racks, to the right, and the individual computer components put into these, to the top left, with the wiring shown below to the left. Lots of text with arrows to different parts.
****The fourth page is page 23 about Trees: ''Tree''. It clearly shows the silhouette of a white tree on blue background. Several animal live on, in and beneath it. Cueball is standing on the ground. All the text are beneath labels that points to parts of the tree or the tree dwellers.
***In between the two time two pages there is a readable text, split over five lines, with two arrow at the top going from the corners of the text to the near corners of the white pages to either side. And below three arrows, with two pointing similarly as the two top arrows, but starting at the bottom of the text, and one arrow pointing straight down from the middle of the text to the large image below.
***Beneath all this is a large image which shows a zoom in on the left part of the cockpit from the second page above. The zoom is focused on the two front windows, but only the left is entirely in the picture, and the balloon hanging Cueball, cannot be seen in this part of the right window.
****At this zoom level, most of the text van be read (that is labels written on things or having arrows pointing to them). Clouds can bee seen out of both windows and in the background a rocket launch with smoke plume below the rocket is visible. The horizon line is well defines across both windows. Some of the instruments can be seen below the windows with text written on them. And some blue areas, mainly screens can be seen.
***Beneath this picture is a line with links to where the book can be ordered, like the one from the previous header text.
**The text:
***Pages from my new book, ''Thing Explainer'': Complicated stuff in simple words.
***[Labels in the cockpit]:
****Sky
****Ground (This should be below the sky. If it's above the sky, you're either having a big problem or doing something ''really'' fun.)
****Use this stuff to tell the sky boat to fly itself.
****Fly
****How fast it feels IAS 172
****Direction HDG 240
****Fall or rise
****How high 2500
****Fly
****Helpful screen
****Where the ground is
****You are: Flying
****Look here if there is a problem
***Below this image is a line of text with the first word in black and the other are four links to where to order the book:
****Order: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
***The image is a link to [https://www.amazon.com/gp/product/0544668251/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0544668251&linkCode=as2&tag=thekcs-20&linkId=S4XRZJJKSMHOWEQU Thing Explainer on Amazon].
**It was only part of the header for two days until [https://web.archive.org/web/20151204050419/http://xkcd.com/ 2015-12-04].
***It was then moved below the comics as mentioned above from [https://web.archive.org/web/20151205070539/http://xkcd.com/ 2015-12-05] when the next comic [[1612: Colds]] came out.

===2015-11-24 - Thing Explainer is out today===
*[https://web.archive.org/web/20151124201602/http://xkcd.com/ 2015-11-24]
**[[1607: Supreme Court]] was still up, but [[1608: Hoverboard]] most have come out close to the change.
***See both [https://web.archive.org/web/20151125001228/http://xkcd.com/ 2015-11-25 00:12] and [https://web.archive.org/web/20151125230753/http://xkcd.com/ 2015-11-25 23:07].
***Since this new "comic" was actually a {{w|browser game}} made to celebrate the release of Randall's new book, ''[[Thing Explainer]]'', which was released on the same day as this comic: Tuesday, November 24, 2015. The comic thus appeared on a Tuesday, replacing that week's normal Wednesday release to coincide with the release day.
***Hence it is a shame that there is no archived versions on the 24th showing Hoverboard on the front page. Even though the new version of the Header text is shown on the 24th, but on the previous comic.
**Cause all the header text is about is the release day of Thing Explainer!
***The top part is text with a line with large letters and a line below in brackets and using smaller letters. Below that there is a line dividing the text from the next part.
***Below follows the same header that was up as early as [[#2015-05-15 - Thing Explainer details|2015-05-15]] with the open book and three lines of text.
**The text:
***My new book, [http://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ Thing Explainer], is out today!
***(If you're in NYC, you can also [https://web.archive.org/web/20150925015809/http://stores.barnesandnoble.com:80/author/11170358 come see me]!)
***A picture of the open book is shown with diagrams of a human cell on the left page and suspension bridges on the right. All held in blue nuances. And arrow goes from the first word of the text to the right to the book on the left. The text is also blue except the title of the book which is in red:
****New book: Thing Explainer
****Up Goer Five-style diagrams of things (explained in the ten-hundred most common words)
***Below this image is a line of text with the first word in black and the other are four links to where to order the book:
****Order: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
***The image above the order line is a link to the [[Blag]] post [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ New book: Thing Explainer].
**Already the day after [https://web.archive.org/web/20151125001228/http://xkcd.com/ 2015-11-25], when [[1608: Hoverboard]] was up, an extra line (a link) was added below the above. A line was separating it from the links above:
***[http://blog.xkcd.com/2015/11/24/a-puzzle-for-the-uk/ A puzzle for UK readers]
****This was to a blag post with A puzzle for the UK because he could not go to UK in person. So this was a kind of bonus for those who could solve it. (We need an entry on that here on xkcd...)
**On [https://web.archive.org/web/20151127114432/http://xkcd.com/ 2015-11-27] is still looked like this but then when the next comic, [[1609: Food Combinations]], came out on [https://web.archive.org/web/20151128130851/http://xkcd.com/ 2015-11-28] the line about seeing him in New York was removed.
**The version with the puzzle, but without the New York line, was then up until [https://web.archive.org/web/20151201222148/http://xkcd.com/ 2015-12-01] when [[1610: Fire Ants]] was up.
**Then on [https://web.archive.org/web/20151202225254/http://www.xkcd.com/ 2015-12-02] the line with the puzzle at the bottom was changed to:
***I'm doing a [https://www.facebook.com/AndyWeirAuthor/ live Q&A;] at 2:30pm PT with The Martian author Andy Weir.
****The link is to {{w|Andy Weir}}'s Facebook page. And the Q&A can likely not be seen anymore.
****Randall has made no less than two comics about the movie {{w|The Martian (film)|The Martian}}, [[1536: The Martian]] and [[1585: Similarities]].
***It only lasted that day, and this became the last day with this header text, so it ended while [[1611: Baking Soda and Vinegar]] was up.

===2015-10-22 - World Polio Day===
*[https://web.archive.org/web/20151022200022/http://xkcd.com/ 2015-10-22]
**[[1593: Play-By-Play]] was up when the header changed.
***Randall mentions World Polio Day and the comic he drew for Bill Gates' blog, [[XKCD Marks the Spot]].
***Although he still keeps mentioning the release date for [[Thing Explainer]].
**The text:
***We've [https://slate.com/technology/2015/08/no-new-polio-in-africa-for-one-year-gates-epidemiologist-on-vaccines-and-surveillance.html almost eradicated polio]. For World Polio Day, I drew a comic
***about the eradication efforts. You can see it on [https://www.gatesnotes.com/Health/XKCD-Marks-the-Spot Bill Gates's blog].
***My [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ new book] of complex diagrams and simple words comes out Nov 24th.
****The last line is split from the Polio announcement with a line.
**Was there until [[1607: Supreme Court]] was up on [https://web.archive.org/web/20151124065108/http://xkcd.com:80/ 2015-11-24].
***That was the day that the book was released, and when the next comic [[1608: Hoverboard]] came out, it was a celebration of the book.

===2015-09-23 - Book trip and tool===
*[https://web.archive.org/web/20150923044724/http://xkcd.com/ 2015-09-23]:
**[[1580: Travel Ghost]] was up when the header changed.
***Announcing the book trip for the [[Thing Explainer]] book as well as linking to a Thing Explainer word checker tool! Two lines of text with links.
**The text:
***News: Announcing my Thing Explainer [https://blog.xkcd.com/2015/09/22/im-going-on-a-book-trip/ book trip]. Come say hi!
***Other news: Announcing the Thing Explainer [https://blog.xkcd.com/2015/09/22/a-thing-explainer-word-checker/ word checker] tool!
****Both links are to the [[Blag]], the first a schedule for his book trip, and the second telling about Randall's new [https://xkcd.com/simplewriter/ Simple Writer] that could help you ''Write Like Up Goer Five and Thing Explainer''.
**Was there until [[1593: Play-By-Play]] was up on [https://web.archive.org/web/20151021164208/http://xkcd.com/ 2015-10-21].

===2015-09-06 - New links===
*[https://web.archive.org/web/20150906181550/http://xkcd.com/ 2015-09-06]:
**[[1573: Cyberintelligence]] was still up when the header changed.
***The promotion of the book, [[Thing Explainer]], stayed the same with a picture above links to preorder it, but the links was reduced from four to two, the amazon link changed and a new company was added for the second link removing the other three.
***See [[#2015-05-15 - Thing Explainer details|2015-05-15]] below for all details on the image.
**The new link text:
***Preorder: [https://www.amazon.co.uk/Thing-Explainer-Randall-Munroe/dp/1473620910 Amazon.co.uk}, [https://www.waterstones.com/book/thing-explainer/9781473620919 Waterstones]
**Was there until [[1579: Tech Loops]] was up on [https://web.archive.org/web/20150919220105/http://xkcd.com/ 2015-09-22].

===2015-08-09 - Back to previous header===
*[https://web.archive.org/web/20150809230825/http://xkcd.com/ 2015-08-09]:
**[[1561: Water Phase Diagram]] was still up when the header changed.
***It changed back to the exact same heading as before the one with other news here below.
****See [[#2015-05-15 - Thing Explainer details|2015-05-15]] below for all details.
**Stayed like this until [[1573: Cyberintelligence]] was out on [https://web.archive.org/web/20150905154014/https://xkcd.com/ 2015-09-05], but the only change was that the links to preorder changed from four to only two.

===2015-06-06 - Other news===
*[https://web.archive.org/web/20150606084120/http://www.xkcd.com/ 2015-06-06]
**Changed while [[1534: Beer]] was still up.
***This was just adding some "Other news", but leaving the promotion of [[Thing Explainer]] unchanged as in the [[#2015-05-15 - Thing Explainer details|previous header]], but adding two news stories in text below the link to preorder.
**The new text:
***In other news, [https://www.youtube.com/watch?v=ygrdAvmr-MA Space Weird Thing] is delightful, and I feel surprisingly invested in [https://web.archive.org/web/20150720074919/https://twitter.com/xkcdbracket @xkcdbracket's] results.
****The link to Space Weird Thing is a YouTube video with a simple words version of {{w|David Bowie|David Bowie's}} [https://www.youtube.com/watch?v=iYYRH4apXDo Space Oddity] music video, using only the top then hundred words. The creators contributes the idea to the [[1133: Up Goer Five]] diagram which also inspired the book Thing Explainer, also promoted in this header text.
****The other link is referring to [[1529: Bracket]] released 12 days before this update, as a twitter user made a survey going through all the brackets all the way to a winner was found. Seems Randall became interested in who won. See more on the comics page.
**Was there until [[1561: Water Phase Diagram]] was up on [https://web.archive.org/web/20150807181044/http://xkcd.com/ 2015-08-07]. Then it returned back to the previous header with only the promotion of the book.

===2015-05-15 - Thing Explainer details===
*[http://web.archive.org/web/20150515060322/http://www.xkcd.com/ 2015-05-15]
**[[1525: Emojic 8 Ball]]
**This was a more detailed promotion for Randall's new book: [[Thing Explainer]] to be published in November 2015, more than half a year after the announcement, compared to the previous change which was just a line and a link.
**The text:
***A picture of the open book is shown with diagrams of a human cell on the left page and suspension bridges on the right. All held in blue nuances. And arrow goes from the first word of the text to the right to the book on the left. The text is also blue except the title of the book which is in red:
****New book: Thing Explainer
****Up Goer Five-style diagrams of things (explained in the then hundred most common words)
***Below this image is a line of text with the first word in black and the other are four links to where to preorder the book:
****Preorder: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
***The image above the preorder line is a link to the [[Blag]] post [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ New book: Thing Explainer].
**Changed while [[1534: Beer]] was up on [https://web.archive.org/web/20150605082643/http://xkcd.com/ 2015-06-05], but only to add other information. The main promotion of the book stayed the same.

===2015-05-14 - New book Thing Explainer===
*[https://web.archive.org/web/20150514053623/http://www.xkcd.com/ 2015-05-14]
**[[1524: Dimensions]] was up.
***A single line announced the new [[Thing Explainer]] book, with link to the [[Blag]] post from the day before.
**The text:
***New book: [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ Thing Explainer!]
*The [[:Category:Book promotion|promotion of the book]] stayed up with some changes for [[xkcd_Header_text#2015-12-13_-_Thing_Explainer_is_available|more than 10 month]] first stopping when Randall had [[xkcd_Header_text#2016-04-01_-_The_xkcd_April_1st_comic_is_currently_experiencing_technical_difficulties|problems with his April Fool's comic]] in 2016... It is a record length.
**The first came already the day after so this short announcement was only up on this day and ended with the next comic. See above.
**See more details on the promotion of the book on the Thing Explainer page [[Thing_Explainer#Promotion_at_the_xkcd_home_page|here]].

===2015-02-11 - Back to standard text===
*[https://web.archive.org/web/20150211154103/http://xkcd.com/ 2015-02-11]
**When [[1485: Friendship]] came out the text returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**It stayed like this until [[1523: Microdrones]] was up on [https://web.archive.org/web/20150512184622/http://xkcd.com/ 2015-05-12], so just a day more than three months.

===2015-02-04 - Valentine cards only===
*[https://web.archive.org/web/20150204051152/http://xkcd.com/ 2015-02-04]
**[[1482: NowPlaying]] came out as it changed.
***After the last day of ordering t-shirt had passed it changed back to the picture with the Valentine cards from the previous header, but without the t-shirt picture.
***See that [[#2015-01-29 - Valentine cards and shirt|header change]], but only the first picture described.
**Ended while [[1484: Apollo Speeches]] was up on [https://web.archive.org/web/20150210005540/http://xkcd.com/ 2015-02-10].

===2015-02-02 - Last day shirt===
*[https://web.archive.org/web/20150202092804/http://xkcd.com/ 2015-02-02]
**[[1481: API]] came out as it changed.
***Just letting people know it is the last chance to order the binary t-shirt.
***There was just a line of text:
**The text was:
***Today is the last day to order the limited-run [https://web.archive.org/web/20150202092804/http://teespring.com/xkcdbinaryheart binary heart shirt]!
***The last words is link to the shirt in the shop.
**Ended before the next comic was up, but still the day after, when it was too late to order: [https://web.archive.org/web/20150203022036/http://xkcd.com/ 2015-02-03].

===2015-01-29 - Valentine cards and shirt===
*[http://web.archive.org/web/20150129183442/http://xkcd.com/ 2015-01-29]
**[[1479: Troubleshooting]] was up when it changed.
***It was to tell about both the two previous updates in the same header- Both about the collaboration to make science themed Valentine's Day cards and his new Valentine t-shirt.
***There where two pictures, with a promotion of the two products and a link to them in the shop.
***On the left was text about the cards with a small drawing to the right of the text showing the four cards.
****An ant talking to an aphids; Earth rotating about the sun but locked so one side melts; an ant with a fungus growing from it's head with a heart, and a Velociraptor skeleton where the last bit of the tail is put on by a person. The text on the cards are unreadable, but they can be seen via the link.
***The text (in three lines) was:
****Webcomic science Valentine card collaboration
****The [https://web.archive.org/web/20150127161237/http://store.xkcd.com/products/webcomic-science-valentines link to the cards] from the picture.
***The picture on the left shows binary numbers 0 and 1 in white on a black background. The middle of the three lines of those have message in red text.
***The text:
****0 1 0 1 0 Binary heart 1 1 1
****1 1 1 Valentine shirt 0 1
****0 0 0 1 [limited run] 0 0 1
****The [http://web.archive.org/web/20150125080756/http://teespring.com/xkcdbinaryheart link to the shirt] from the picture.
**Ended while [[1480: Super Bowl]] was up on [https://web.archive.org/web/20150201015913/http://xkcd.com/ 2015-02-01].

===2015-01-27 - Valentine's Day cards===
*[http://web.archive.org/web/20150127161237/http://xkcd.com/ 2015-01-27]
**[[1478: P-Values]] was up when it changed.
***It was to tell that about a collaboration to make science themed Valentine's Day cards.
***There was just two lines of text:
**The text was:
***I've teamed up with three other webcomic artists
***to make [https://web.archive.org/web/20150127161237/http://store.xkcd.com/products/webcomic-science-valentines a set of science-themed Valentine's Day cards]!
**There was a link to the cards on the store.
**Ended while [[1479: Troubleshooting]] was up [https://web.archive.org/web/20150128172147/http://xkcd.com/ 2015-01-28].

===2015-01-24 - Get shirts in store===
*[http://web.archive.org/web/20150124110707/http://xkcd.com/ 2015-01-24]
**[[1477: Star Wars]] came out as it changed.
***It was to tell about a new type of t-shirt for Valentine Day.
***There was just two lines of text:
**The text was:
***For Valentine's Day, you can get a binary heart shirt
***(from {{xkcd|99|comic #99!}}) in [http://web.archive.org/web/20150125080756/http://teespring.com/xkcdbinaryheart a limited run on TeeSpring]
**There was a link to [[99: Binary Heart]] and to the relevant t-shirt on the [https://teespring.com/ Teespring] home page.
**Ended while [[1478: P-Values]] was up [http://web.archive.org/web/20150126133139/http://xkcd.com/ 2015-01-26].

===2014-12-22 - Get shirts in store===
*[http://web.archive.org/web/20141222233233/http://xkcd.com/ 2014-12-22]
**[[1463: Altitude]] came out as it changed.
***After the Christmas sale deadline there was still merchandise in the [https://store.xkcd.com/ xkcd store].
***There was just a line of text:
**The text was:
***You can get xkcd shirts, prints, and posters in the [http://shop.xkcd.com/ store]!
**The word store was a link to the shop.
**Ended while [[1476: Ceres]] was up [http://web.archive.org/web/20150123102318/http://xkcd.com/ 2015-01-23].

===2014-12-19 - Back to previous header===
*[http://web.archive.org/web/20141219092349/http://www.xkcd.com/ 2014-12-19]:
**[[1462: Blind Trials]] came out as it changed.
*It changed back to the exact same heading as before the one with order now here below.
**See [[#2014-12-17 - Christmas deadline|2014-12-17]] below for all details.
**Ended while [[1462: Blind Trials]] was still up [http://web.archive.org/web/20141221172450/http://www.xkcd.com/ 2014-12-21].

===2014-12-18 - Order now===
*[http://web.archive.org/web/20141218090650/http://www.xkcd.com/ 2014-12-18]
**[[1461: Payloads]] was still up when it changed.
***It was to alert that the deadline for shipping before Christmas from the [https://store.xkcd.com/ xkcd store] was Friday and that it was rapidly approaching. This was a follow up on the [[#2014-12-17 - Christmas deadline|Wednesdays announcement]] the day before.
***The image was just four lines of text with several red and blue words.
**The text was:
***The xkcd store Christmas shipping deadline is Friday!
***Once it passes, there is no going back. The arrow of time drags us all
***Inexorably forward toward decay and disorder. toward the end of all things.
***Towards the empty silence of the grave. Order now!
**The entire drawing was a link to the [https://store.xkcd.com/ xkcd store], not just the blue text.
**Ended a day later while [[1461: Payloads]] was still up [http://web.archive.org/web/20141216084107/http://xkcd.com/ 2014-12-16].

===2014-12-17 - Christmas deadline===
*[http://web.archive.org/web/20141217085320/http://www.xkcd.com/ 2014-12-17]
**[[1461: Payloads]] came out as it changed.
***It was to alert that the deadline for shipping before Christmas from the [https://store.xkcd.com/ xkcd store] was Friday. This was announced Wednesday two days before the deadline.
***The image was just text with the last word in each line in red and the xkcd store blue as a link.
**The text was:
***Looking for a gift?
***xkcd store Christmas shipping deadline is Friday!
**The entire drawing was a link to the [https://store.xkcd.com/ xkcd store], not just the blue text
**Ended a day later while [[1461: Payloads]] was still up!

===2014-12-03 - Christmas shopping===
*[http://web.archive.org/web/20141203132024/http://www.xkcd.com/ 2014-12-03]
**[[1455: Trolley Problem]] came out as it changed.
***It was to announce the start of the Christmas shopping on the [https://store.xkcd.com/ xkcd store]
***Four boxes with shipping details are shown. Two green and two red, alternating from green. Between them are three text messages in two, two and three lines.
**The text was:
***xkcd store
***Christmas shopping
***I will probably not ship you a bobcat.
**The entire drawing was a link to the [https://store.xkcd.com/ xkcd store].
**The bobcat is a reference to [[325: A-Minus-Minus]].
**Ended while [[1460: SMFW]] was up [http://web.archive.org/web/20141216084107/http://xkcd.com/ 2014-12-16].

===2014-11-29 - Thanks - Emily===
*[http://web.archive.org/web/20141129211604/http://xkcd.com/ 2014-11-29]
**[[1453: fMRI]] was still up when it changed.
***It was to thanks for all the help his friend Emily with cancer got through among other his previous header text [[#2014-11-27 - Help Emily| Help Emily]].
***That only needed to be up two days before the goal was met.
**The text was:
***Thank you for helping my friend Emily.
***It means so much.
**Ended three days later while [[1454: Done]] was up [http://web.archive.org/web/20141202065133/http://xkcd.com/ 2014-12-02].

===2014-11-27 - Help Emily===
*[http://web.archive.org/web/20141127005239/http://xkcd.com/ 2014-11-27]
**[[1452: Jurassic World]] came out as it changed.
***It was to help a friend who got cancer by raising money for her.
**The text was:
***Hey all. My friend Emily—the economist who helped
***me with my {{xkcd|980|money chart}}—has been fighting cancer. She's
***having a rough time and could use some [http://web.archive.org/web/20141128183414/http://www.gofundme.com/e07dqk help]. Thank you.
**There are two links, one to the [[980: Money]] comic she helped Randall create, and one for her Go Fund Me page to raise money for her cancer cure.
***The help link above is to the archived version from that time, but the link was still active in August 2019: [https://www.gofundme.com/e07dqk Helping Emily Fight Cancer].
**Ended while [[1453: fMRI]] was up [http://web.archive.org/web/20141128070838/http://www.xkcd.com/ 2014-11-28].
***She did thus not get a permanent header as did Becky on the [[#Seven_Years|Seven Years]] comic.

===2014-10-02 - what if? bestseller===
*[http://web.archive.org/web/20141002211139/http://xkcd.com/ 2014-10-02]
**[[1428: Move Fast and Break Things]] was up when it changed from the [[#2014-09-02 - what if? book out|book is out]].
**This was a month after the ''[[What If? (book)|What If?]]'' book came out.
***It added a line of red text beneath the previous header to announce that the book was the #1 New York bestseller.
**The text was:
***My book is out!
***(#1 New York bestseller!)
**The entire image was a link to the [https://whatif.xkcd.com/book/ The Book] page on the [https://whatif.xkcd.com/ what if?] page on xkcd. post.
**Ended while [[1451: Background Screens]] was up [http://web.archive.org/web/20141125234520/http://xkcd.com/ 2014-11-25].

===2014-09-04 - what if? book out===
*[http://web.archive.org/web/20140904150600/http://xkcd.com/ 2014-09-04]
**[[1416: Pixels]] was up when it changed from the [[#2014-09-02 - what if? book out today|book is out today]].
**This was two days after the ''[[What If? (book)|What If?]]'' book came out.
***It only removed to today from the previous header, that had only been up two days.
**The text was:
***My book is out!
**The entire image was a link to the [https://whatif.xkcd.com/book/ The Book] page on the [https://whatif.xkcd.com/ what if?] page on xkcd. post.
**Ended while [[1428: Move Fast and Break Things]] was up [http://web.archive.org/web/20141001130827/http://xkcd.com/ 2014-09-01].

===2014-09-02 - what if? book out today===
*[http://web.archive.org/web/20140902125802/http://xkcd.com/ 2014-09-02]
**[[1415: Ballooning]] was up when it changed from the [[#2014-07-23 - what if? book tour|book tour header]].
**This was the day the ''[[What If? (book)|What If?]]'' book came out. [[Cueball]] standing to the left of the text with arms raised shouts this out.. The word Book is underlined and blue to indicate a link.
**The text was:
***My book is out today!
**The entire image was a link to the [https://whatif.xkcd.com/book/ The Book] page on the [https://whatif.xkcd.com/ what if?] page on xkcd. post.
**Ended while [[1416: Pixels]] was still [http://web.archive.org/web/20140903134518/http://xkcd.com/ 2014-09-03].

===2014-07-23 - what if? book tour===
*[http://web.archive.org/web/20140723180600/http://xkcd.com/ 2014-07-23]
**[[1398: Snake Facts]]
**This was a promotion of his book tour for the ''[[What If? (book)|What If?]]'' book made by [[Cueball]] standing to the left of the text with arms raised. Several parts of the text was underlined and blue to indicate links.
**The text was:
***I'm going on a book tour! click here for a list of stops.
***Or click anywhere-this whole image is one link because I've never gotten the hang of HTML imagemaps.
**The entire image was a link to the [[Blag]] post: [https://blog.xkcd.com/2014/07/22/what-if-book-tour/ What If book tour!].
***Later Randall commented on this lacking ability in the comic: [[1572: xkcd Survey]].
***He also mentions it in one of the [[#xkcd_Header_text#2019-07-09_-_Drawings_from_How_To|promotions]] for his [[How To]] book.
***He much later he again mentions that html is hard, thus explaining why the entire image is a link instead of the actual blue highlighted link in one of the promotions for [[xkcd_Header_text#2022-08-11_-_Preorder_What_if.3F_2_-_with_image|what if? 2]].
**Ended while [[1415: Ballooning]] was still up [http://web.archive.org/web/20140901113916/http://xkcd.com/ 2014-09-01].

===2014-03-13 - what if? announced===
*[http://web.archive.org/web/20140313070951/http://xkcd.com/ 2014-03-13]
**[[1341: Types of Editors]] was up.
**This was the first promotion of Randall's new ''[[What If? (book)|What If?]]'' book which is shown next to two lines of text.
**The text was:
***News:
***I'm publishing a ''what if'' book!
**The entire image was a link to the [[Blag]] post: [https://blog.xkcd.com/2014/03/12/what-if-i-wrote-a-book/ What if I wrote a book?]
**Ended while [[1397: Luke]] was up [http://web.archive.org/web/20140722142115/http://xkcd.com/ 2014-07-22].

===2014-01-09 - Back to standard text===
*[https://web.archive.org/web/20140109190927/http://www.xkcd.com/ 2014-01-09]
**When [[1314: Photos]] was still up when the text returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**It stayed until [https://web.archive.org/web/20140312070248/http://xkcd.com/ 2014-03-12] when [[1340: Unique Date]] was up, a bit more than two months.

===2013-12-21 - Deadline for Christmas shipping has passed===
*[https://web.archive.org/web/20131221043417/http://www.xkcd.com/ 2013-12-21]
**It changed when [[1306: Sigil Cycle]] came out.
**This came up when it was too close to Christmas in 2013 for shipping to arrive in time for Christmas. And Randall makes a note of this, but lets people know that they could still buy presents...
**The text was
***The deadline for guaranteed Christmas shipping has passed, but if you order something from the [http://store.xkcd.com/ xkcd store], we'll get it to you as fast as possible!
**Ended when [[1314: Photos]] was up on [https://web.archive.org/web/20140108181520/http://www.xkcd.com/ 2014-01-08].

===2013-12-06 - Empty header===
*[https://web.archive.org/web/20131206213503/http://xkcd.com/ 2013-12-06]
**It changed when [[1300: Galilean Moons]] came out.
***There just where no header text. This has not happened since. It looks really weird.
**Ended when [[1305: Undocumented Feature]] was up on [https://web.archive.org/web/20131220005306/http://xkcd.com/ 2013-12-20].

===Changes not documented yet 3===
*More changes will for sure be here between this and the one below.

====Interesting links in the Archive 3====
*Just put the link here with a date and maybe a short note:
*[https://web.archive.org/web/20131205202730/http://xkcd.com/ 2013-12-05]: Xmas sale before above
*[https://web.archive.org/web/20130315162227/http://xkcd.com:80/ 2013-03-15]: Empty follows below

===2013-03-15 - Empty header===
*[https://web.archive.org/web/20130315162227/http://xkcd.com:80/ 2013-03-15]
**It changed while [[1186: Bumblebees]] was on the front page.
***After the text saying a comic would be delayed disappeared no text replaced this.
***So the header was left empty!
**This lasted until [https://web.archive.org/web/20130318072820/http://xkcd.com/ 2013-03-18] while [[1187: Aspect Ratio]] was up.

===2013-03-13 - Comic will be delayed===
*[https://web.archive.org/web/20130313133631/http://xkcd.com/ 2013-03-13]
**It changed when [[1184: Circumference Formula]] came out, likely because the next comic was delayed.
***But there is a gap of three days before where no archived version exist, so cannot say if there where more than a few hours with this text.
**The text:
***The comic will be delayed until late morning EDT.
**Ended when [[1185: Ineffective Sorts]] was up on [https://web.archive.org/web/20130313175306/http://xkcd.com:80/ 2013-03-13].
***That was later same day as the first archived version. But could have been longer as mentioned above.

===2012-11-26 - xkcd store===
*[https://web.archive.org/web/20121126235628/http://xkcd.com/1138/ 2012-11-26]
**It changed while [[1138: Heatmap]] was up.
***Notice that the above link is not from the main page, but from {{xkcd|1138}}.
***There was a gap of five days in the archive of the main page.
***The first day that it was archived from the front page was on [https://web.archive.org/web/20121201111432/http://xkcd.com/ 2012-12-01], while [[1141: Two Years]] was up.
**The standard header text is replaced with an image that makes it seem like a rip is being torn in the white region where the text used to be. Beneath the white material that has now been ripped, some text can partly be seen. It is possible to read it.
**The text:
***xkcd store
****The image is a link to the [http://store.xkcd.com/ xkcd store] (tadaaa!)
**Ended when [[1183: Rose Petals]] was up on [https://web.archive.org/web/20130311073948/http://xkcd.com:80/1183/ 2013-03-11]
***The above link is from {{xkcd|1183}}.
***Last time the front page was archived with it was though on [https://web.archive.org/web/20130309010403/http://xkcd.com/ 2013-03-09].

===2012-10-24 - Back to standard text===
*[https://web.archive.org/web/20121024082017/http://xkcd.com:80/ 2012-10-24]
**While [[1124: Law of Drama]] was on the front the header returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**It stayed until [https://web.archive.org/web/20121126035129/http://xkcd.com:80/ 2012-11-26] when [[1138: Heatmap]] was up, a few days more than a month.

===2012-10-17 - New What-If - Lightning===
*[https://web.archive.org/web/20121017232102/http://xkcd.com/1121/ 2012-10-17]
**Probably while [[1122: Electoral Precedent]] was up.
***But the link above showing it was up on the 2012-10-17 is from the previous comics page {{xkcd|1121}} [[1121: Identity]].
***But the first version archived with this header is saved on [https://web.archive.org/web/20121018082304/http://xkcd.com/ 2012-10-18]
**Randall promotes another New What-If article.
***See the ''[[what if? (blog)|what if?]]'' article ''{{what if|16|Today's topic: Lightning}}''.
**The text
***New What-If article:
***[http://what-if.xkcd.com/16/ What if lightning struck while you were ...]
**This lasted until [https://web.archive.org/web/20121023023404/http://xkcd.com/1121/ 2012-10-23] when [[1124: Law of Drama]] was on the front page
***This link is though from {{xkcd|1121}}.
***The last this version was archived on the front page was the day before on [https://web.archive.org/web/20121022120008/http://xkcd.com:80/ 2012-10-22].

===2012-10-10 - New What-If - Mariana Trench Explosion===
*[https://web.archive.org/web/20121010003837/http://xkcd.com/ 2012-10-10]
**[[1118: Microsoft]] was still up at this time.
**Randall promotes another New What-If article.
***See the ''[[what if? (blog)|what if?]]'' article ''{{what if|15|Mariana Trench Explosion}}''.
**The text
***New What-If article:
***[http://what-if.xkcd.com/15/ What if you set off a nuclear bomb in the Mariana Trench?].
**This lasted until [https://web.archive.org/web/20121016055538/http://xkcd.com:80/ 2012-10-16] when [[1121: Identity]] was up.

===2012-10-02 - This week's What-If - Short Answer Section===
*[https://web.archive.org/web/20121002231724/http://www.xkcd.com/ 2012-10-02]
**[[1115: Sky]] was still up at this time.
**Randall promotes another New What-If article.
***See the ''[[what if? (blog)|what if?]]'' article ''{{what if|14|Short Answer Section}}''.
**The text
***In this week's What-If article I [https://what-if.xkcd.com/14/ answer multiple reader questions].
**This lasted until [https://web.archive.org/web/20121008112434/http://xkcd.com/ 2012-10-08] when [[1118: Microsoft]] was up.

===2012-09-26 - New What-If - Laser Pointer===
*[https://web.archive.org/web/20120926163111/http://xkcd.com/1108/ 2012-09-26]
**[[1113: Killed in Action]] was up at this time.
***The link above showing it happened on the 26th is from {{xkcd|1108}}
***The first day this version was archived on the front page was on [https://web.archive.org/web/20120928003838/http://xkcd.com:80/ 2012-09-28]
**Randall promotes another New What-If article.
***See the ''[[what if? (blog)|what if?]]'' article ''{{what if|13|Laser Pointer}}''.
**The text
***New What-If article:
***[http://what-if.xkcd.com/13/ If everyone aimed a laser pointer at the Moon at once, would it change color?]
**This lasted until [https://web.archive.org/web/20121001080517/http://xkcd.com/ 2012-10-01] when [[1115: Sky]] was up.

===2012-09-18 - what-if.xkcd.com - Raindrop===
*[https://web.archive.org/web/20120918143653/http://www.xkcd.com/1108/ 2012-09-18]
**[[1109: Refrigerator]] was still up at this time.
***The link above showing it happened on the 18th is from {{xkcd|1108}}
***The first day this version was archived on the front page was on [https://web.archive.org/web/20120919015232/http://xkcd.com/ 2012-09-19]
**Randall promotes another What-If article on the what-if page.
***See the the ''[[what if? (blog)|what if?]]'' article ''{{what if|12|Raindrop}}''.
**The text
***what-if.xkcd.com: [https://what-if.xkcd.com/12/ What if all of a storm's water fell in a single raindrop?].
**This lasted until [https://web.archive.org/web/20120925090123/http://xkcd.com:80/ 2012-09-25] when [[1112: Think Logically]] was up.

===Changes not documented yet 2===
*The above is the last documented.
**There will for sure be more changes earlier than this.

====Interesting links in the Archive 2====
*Just put the link here with a date and maybe a short note:
*[https://web.archive.org/web/20120917052827/http://xkcd.com:80/ 2012-09-17]: What if Droppings ends.
*[https://web.archive.org/web/20120718231719/http://www.xkcd.com/ 2012-07-18] Next stores header text

===2012-07-10 - New: what-if.xkcd.com===
*[https://web.archive.org/web/20120710114846/http://xkcd.com/1078/ 2012-07-10]
**This was a special change happening over a few days. The above "new" header text from the given date is actually shown on the previous comic [[1078: Knights]].
***Another example from [https://web.archive.org/web/20120710072249/http://xkcd.com:80/1070 2012-07-10] is shown for [[1070: Words for Small Sets]].
**The comic on the main page released on [https://web.archive.org/web/20120709045709/http://xkcd.com:80/ 2012-07-09] was [[1079: United Shapes]], but that comic had a [[xkcd_Header_text#United_Shapes|unique header text]] upon its release.
***So both on the 9th as shown above and on [https://web.archive.org/web/20120710114846/http://xkcd.com/1078/ 2012-07-10] the header text was different on the front than on all other pages.
****As can be read in the link above, the new header text actually got incorporated into the unique text, so that after the next comic was released on [https://web.archive.org/web/20120711234408/http://xkcd.com/1079/ 2012-07-11] the current new header text and a smaller version of the original unique header text was now shown on the Unites Shapes page.
****{{xkcd|1079|And it was never changed back}}.
**The first version of the new text from the 10th was only active one day:
***The text:
****New site: what-if.xkcd.com, where I abuse science to answer hypothetical questions. I'll answer a new question every Tuesday.
*****The link was not an active link. And this was never shown on the front page, but on all other comics.
**Already on [https://web.archive.org/web/20120711223349/http://xkcd.com/1078/ 2012-07-11] when [[1080: Visual Field]] was released the new header changed a bit
***At this time it most have been shown on the front page, but the link above is again from [[1078: Knights]].
****For some reason the front page was not saved on either the 11th or 12th, so no version of the front page with Visual Field exist
****The first archived version of the front page with this new header text was from [https://web.archive.org/web/20120713154207/http://xkcd.com/ 2012-07-13] when [[1081: Argument Victory]] was on the front page.
**The final text:
***New: [http://what-if.xkcd.com/1/ what-if.xkcd.com]: abusing science to answer hypothetical questions.
***I'll answer a new reader question every Tuesday.
****This time the link was active and directs to the new ''[[what if? (blog)|what if?]]'' blog and its first entry {{what if|1|Relativistic Baseball}}
**The whole idea was that Randall released the new what if? blog on the 10th of July 2012. And thus would like to make a promotion of it.
***And then he timed it so poorly that the front page had a different header than the rest of the comics.
***It was so annoying for him that he actually changed the header for Unites Shapes manually so that page also showed the new link. Maybe even before it left the front page, but that has not been documented in the archive.
***And then he forgot about it when the header changed for all the other comics, so it is now a relic of the promotion of his first what if release.
**The what if promotion continued for a long time, but the final version from above only lasted until 17th at the latest. There is again no archived versions of the front page from the 15th, 16th or 17th.
***The last time it was archived on the front page was [https://web.archive.org/web/20120714062857/http://xkcd.com/ 2012-07-14], when [[1081: Argument Victory]] was still up.
***But on [https://web.archive.org/web/20120715070938/http://xkcd.com:80/1081/ 2012-07-15] it was still shown on the page for Argument Victory and same for [https://web.archive.org/web/20120716235458/https://www.xkcd.com/998/ 2012-07-16] on [[998: 2012]]
****So seemed it stayed up while [[1082: Geology]] was up on the 16-17/7.

===2012-04-09 - Standard text plus store link===
*[https://web.archive.org/web/20120409190952/http://xkcd.com/1026/ 2012-04-09]
**It changed when [[1040: Lakes and Oceans]] came up.
***The above link to prove this is though from comic {{xkcd|1026}} [[1026: Compare and Contrast]] the first to be found that where archived on the 9th.
***The first archived version on the main page is from [https://web.archive.org/web/20120411053543/https://xkcd.com/ 2012-04-11] when [[1041: Whites of Their Eyes]] was up.
***There where no archived version of the front page on the 9th or 10th while Lake and Oceans was up. So it was also first on the 11th that this new text could be seen, but only when it had moved to its own page number [https://web.archive.org/web/20120411052948/http://xkcd.com/1040/ 1040].
****The change probably came because of this special comic, which may became a [https://store.xkcd.com/collections/posters/products/lakes-oceans-poster poster].
**The update was to add a promotion for the store under the standard header text.
**The text
***XKCD updates every Monday, Wednesday, and Friday.
***You can get prints, posters, and t-shirts in the [http://store.xkcd.com/ store].
**This lasted until [https://web.archive.org/web/20120709004956/http://www.xkcd.com/ 2012-07-09] when [[1078: Knights]] was up, exactly three months, so although not only the standard text, the standard text was first for three months and three days, see [[#2012-04-05 - Back to standard text|below]].

===2012-04-05 - Back to standard text===
*[https://web.archive.org/web/20120405195956/http://www.xkcd.com/1021/ 2012-04-05]
**While [[1038: Fountain]] was on the front the header returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**The link above to prove the date is seen on [[1021: Business Plan]].
***The first archived version on front page is from [https://web.archive.org/web/20120406111048/http://xkcd.com/ 2012-04-06], when [[1039: RuBisCO]] was up.
***A version showing Fountain with this can be found on it's own page {{xkcd|1038}} on [https://web.archive.org/web/20120406085618/http://xkcd.com:80/1038/ 2012-04-06].
****When it was archived while on the front page it still had the previous header on [https://web.archive.org/web/20120404210927/http://xkcd.com:80/ 2012-04-05].
**It stayed up, unchanged, until [https://web.archive.org/web/20120408200414/http://xkcd.com:80/ 2012-04-08] when [[1039: RuBisCO]] was up. So only three days.
***But [[#2012-04-09- Standard text plus store link|the change]] did not remove the standard text but just added a link to the store. And this version, still with the standard text at the top stayed for three more months.

===2012-03-28 - Visiting Newport News===
*[https://web.archive.org/web/20120328103319/http://xkcd.com/ 2012-03-28]
**[[1035: Cadbury Eggs]] was on the front when it changed.
***From the end of March 2012, there is a problem with the archived versions of xkcd, so they do not load properly and do not include the comic picture.
**It was to announce a talk Randall gave at his old school.
**The text:
***I'm [https://blog.xkcd.com/2012/03/22/im-visiting-cnu-on-april-4th/ visiting] Newport News, VA next week, where I'll be speaking at CNU, my old school. If you want to come, reserve a seat [https://web.archive.org/web/20120329214411/http://www.cnu.edu/pcs/xkcd/index.asp here]!
****The first link it to a post in the [[Blag]]: [https://blog.xkcd.com/2012/03/22/im-visiting-cnu-on-april-4th/ I’m visiting CNU on April 4th].
****The other link is no longer working, but the link above goes to an archived version.
**There was a special situation with this header text. For three days it was not on the front page, as the [[:Category:April fools' comics|April fools' comic]] [[1037: Umwelt]] came out and stayed from April 1st to April 3rd on the front page.
***This comic had it's own [[#Unique header text|unique header text]] from the start, one that has [[#Umwelt|stayed like this]] since!
****So from [https://web.archive.org/web/20120401151639/http://xkcd.com:80/ 2012-04-01] to [https://web.archive.org/web/20120403223453/http://www.xkcd.com/ 2012-04-03] the front page had another header:
*****You can get posters, prints, and t-shirts in the [https://store.xkcd.com/ xkcd store].
***But all the other comics kept the Visiting header on all three days as shown here:
****[https://web.archive.org/web/20120401214214/http://xkcd.com:80/1036/ 2012-04-01] from[[1036: Reviews]].
****[https://web.archive.org/web/20120402150258/http://xkcd.com/1019 2012-04-02] from [[1019: First Post]].
****[https://web.archive.org/web/20120403164523/http://xkcd.com:80/1036/ 2012-04-03] from [[1036: Reviews]].
*****The one from the 2nd of April was hardest to find, but the most important, because that was clearly in the time period where Umwelt was up, thus definitely proving that the other pages had a different header than the front page. This is rare.
**It returned to the front page on [https://web.archive.org/web/20120404210927/http://xkcd.com:80/ 2012-04-04] and stayed up until [https://web.archive.org/web/20120405195956/http://www.xkcd.com/1021/ 2012-04-05] when [[1038: Fountain]] was up.
***The link from the 5th though is from {{xkcd|1021}} [[1021: Business Plan]], the only comic archived on the 5ht to be found.
****The previous link was the last time it was archived while on the front page.

===2012-03-12 - xkcd Holistic Browser===
*[https://web.archive.org/web/20120312185125/http://xkcd.com/ 2012-03-12]
**[[1028: Communication]] was up at the time.
***From here the archive doesn't load the page properly so it is really boring to document. This goes for both first and last day of this text.
**The text:
***New: [https://web.archive.org/web/20120318153220/http://holistic.xkcd.com/ holistic.xkcd.com], the least useful web navigation tool ever.
****The link is now dead, but the link above is to an archived version.
****On that page there is the following text:
*****The XKCD Holistic Browser
*****Because we are all one.
*****Type a web address
*****and you'll be taken to one
*****typed by someone else.
*****URL:
*****Warning: This allows strangers to direct your browser!
*****They may send you to pages containing
*****porn, viruses, or Justin Bieber fanfiction.
*****At the very least, turn on private browsing.
**During the time this header was active the comic [[1031: s/keyboard/leopard/]] came out.
***It had its own [[xkcd_Header_text#Unique_header_text|unique header text]] which thus replaced this text on the front page for two days.
***But it did not replace it on all the other pages so this was the active header text during the entire period, see more here: [[xkcd_Header_text#s.2Fkeyboard.2Fleopard.2F|s/keyboard/leopard/]]
**This lasted till [https://web.archive.org/web/20120327050311/http://xkcd.com/1033 2012-03-27] while [[1034: Share Buttons]] was up.
**But the last archived version with this on the front page was the day before [https://web.archive.org/web/20120326180811/http://xkcd.com// 2012-03-26].
***The link from 27th is from an archived version of [[1033: Formal Logic]].

===Changes not documented yet 1===
*The above is the last documented.
**There will for sure be more changes earlier than this.
*[https://web.archive.org/web/20120311135259/http://xkcd.com/ 2012-03-11] Text before. For next entry below...

[[Category:Design of xkcd.com]]
{{xkcdmeta}}

Header text

2023-12-17T13:29:12Z

McMooseElk: Fixed typo and broken link (calender to calendar)

[[File:xkcd_header.png|thumb|right|250px|The header segment on [[xkcd|xkcd.com]]]]
The '''header text''' is updated whenever [[Randall]] has news to share. However, after the novelty of the news ends, the page usually goes back to its default header text, which states:

:xkcd updates every Monday, Wednesday, and Friday.

In recent times there has been very long between the old go to text has been used for extended periods though. The most recent header text can be found at the top of the [[Header_text#Global_header_text|Global header text]] section, if it has been updated since the last change.

Usually, changes to the header text show up in all comics. However, in certain cases, the header text of a specific comic is changed permanently, which means it won't be modified like the rest of the comics. See the list of these comics [[#Comic-specific header text|here]]

==Comic-specific header text==
{{incomplete|This list is missing many comic-specific header texts. Don't remove this notice unless they're all mentioned here. [[Talk:header_text#1047|See the Talk page]] for some examples.}}

When editing the section, list the changes chronologically with the date of the web archive link and hyperlink each date. Include an internal link to the comic at the time of each change and describe the modifications with relevant information. Place the most recent changes at the top.

===Instructions===
*[[2601: Instructions]]
**This comic's header mentions the people who helped put it together.
***It was on the front page from Friday [https://web.archive.org/web/20220401210146/https://xkcd.com/ 2022-04-01] until Monday [ 2022-04-04], until the new comic was released on Monday.
****Expect there to be a page from April 4, but at this point there is one from [https://web.archive.org/web/20220406124444/https://xkcd.com/ 2022-04-06] showing the front page having returned to normal header.
**The text:
***Today's comic was created with [https://twitter.com/fadinginterest Patrick], [https://twitter.com/Aiiane Amber], [https://twitter.com/chromakode @chromakode], [https://twitter.com/dyfrgi Michael], [https://twitter.com/wirehead2501 Kat], [https://twitter.com/xDirtyPunkx Conor], [https://twitter.com/zigdon @zigdon], and [https://twitter.com/bstaffin Benjamin Staffin].
**It thanks those that helped Randall create that years [[:Category:April fools' comics|April fools' comic]].
***All have a link to their name, the first with an Instagram page, the other seven with a link to their Twitter account. Five of those also helped with the previous April Fools' comic, see below.
**Since this header was related only to the Fools' comic, it was removed from the frontpage header, when the next comic was released.
***But it stayed up as one of the permanent different headers on this comic, as seen two days after it stopped being on the front page on [https://web.archive.org/web/20220406021357/https://xkcd.com/2601/ 2022-04-06].
**See the comic on xkcd {{xkcd|2601}}.

===Checkbox===
*[[2445: Checkbox]]
**This comic's header mentions the people who helped put it together.
***It was on the front page from Thursday [https://web.archive.org/web/20210401232108/https://xkcd.com/ 2021-04-01] until Monday [https://web.archive.org/web/20210405130031/http://xkcd.com/ 2021-04-05], until the new comic was released on Monday.
**The text:
***This comic was put together by [https://chromakode.com/ Max Goodhart], [https://twitter.com/fadinginterest Patrick], [https://twitter.com/Aiiane Amber], [https://twitter.com/bstaffin Benjamin Staffin], [https://twitter.com/cotrone Kevin Cotrone], [https://twitter.com/wirehead2501 Kat], and [https://twitter.com/dyfrgi Michael Leuchtenburg].
**It thanks those that helped Randall create that years [[:Category:April fools' comics|April fools' comic]].
***All have a link to their name, the first with a personal home page, the other six with a link to their Twitter account. Five of those also helped with the previous April Fools' comic, see below.
**Since this header was related only to the Fools' comic, it was removed from the front page header, when the next comic was released, here from the day after that release Tuesday [https://web.archive.org/web/20210406143023/http://xkcd.com/ 2021-04-06].
**But it stayed up as one of the permanent different headers on this comic, as seen two days later on [https://web.archive.org/web/20210407203547/https://xkcd.com/2445/ 2021-04-07].
**See the comic on xkcd {{xkcd|2445}}.

===Collector's Edition===
*[[2288: Collector's Edition]]
**This comic's header mentions the people who helped put it together.
***It was on the front page only for about a day around April 3rd and [https://web.archive.org/web/20200404014814/http://xkcd.com/#-370,-277vApril 4th 2020].
**The text:
***Today's comic was put together by [https://chromakode.com/ Max Goodhart], [https://twitter.com/Aiiane Amber], [https://twitter.com/bstaffin Benjamin Staffin], [https://twitter.com/cotrone Kevin], [https://www.instagram.com/fading_interest/ @fading_interest], [https://twitter.com/wirehead2501 Kat], [https://twitter.com/zigdon @zigdon], and Christopher Night.
****All names have links except the last.
**It thanks those that helped Randall create the 2020 [[:Category:April fools' comics|April fools' comic]], which had taken two extra days before it was released due to the complex nature of the comic.
*Due to the delay the next comic, [[2289: Scenario 4]], was released already the day after the Fool's comic, even though it was thus [[2289:_Scenario_4#Trivia|on a Saturday]]!
**Since this header was related only to the Fools' comic, it was removed from the front page header, when the next comic was released, but it stayed up as one of the permanent different headers on this comic
**See the comic on xkcd {{xkcd|2288}}.

=== Seven Years===
*[[1928: Seven Years]]
**[http://web.archive.org/web/20171214171157/https://xkcd.com/ 2017-12-14]
**It was released as a response to another cancer diagnosis, this is explained in the [[Design_of_xkcd.com#Header_text|Header text]] which has replaced the standard ''xkcd updates every Monday, Wednesday, and Friday.'' The new one is this one, with the active link included:
**The text (with link):
***Becky Beaton, sister of fellow cartoonist Kate Beaton, has also been diagnosed with cancer. You can support her treatment [https://www.youcaring.com/beckybeaton-1008390 here].
**{{w|Kate Beaton}} is the creator of the web comic [http://www.harkavagrant.com/ Hark! A Vagrant].
***Although this comic is not one on Randall's list of ''[[Design_of_xkcd.com#Comics_I_enjoy|Comics I enjoy]]'', he is clearly much influenced by another cancer diagnosis among someone in his own creative field.below.
**On [https://web.archive.org/web/20190817141450/https://www.xkcd.com/1928/ 2019-08-17], close to two years later, the message was still there and also [https://web.archive.org/web/20211226120634/https://xkcd.com/1928/ 2021-12-26] just past four years later.
***There was the possibility that it would be removed, when the support page was discontinued...
***But as that already happened before [http://web.archive.org/web/20181106124430/https://www.youcaring.com/beckybeaton-1008390 2018-11-06] it seems like it will be there to stay.
***Last archived version was from [http://web.archive.org/web/20180305022301/https://www.youcaring.com/beckybeaton-1008390 2018-03-05].
***Randall has previously done something similar for another friend, Emiliy, but [[#2014-11-27_-_Help_Emily|that header]] was not made permanent.
**See the comic on xkcd {{xkcd|1928}}.

===ISS Solar Transit 2===
*[[1830: ISS Solar Transit 2]]
**[https://web.archive.org/web/20170428041338/https://xkcd.com/ 2017-04-28]
**This header links back to [[1828: ISS Solar Transit]], a comic with the same joke setup released on the Monday of the same week
**See the comic on xkcd {{xkcd|1830}}.

===Meteorite Identification===
*[[1723: Meteorite Identification]]
**Randall realized that his comic was almost a copy of some other person. And he has since then acknowledged this on the comics specific page see more [[1723: Meteorite Identification#Trivia|here]].
**At the time of this post, in the newest saved version on the archive from [http://web.archive.org/web/20161010215516/http://xkcd.com/1723/ 2016-10-10] it is still there and says:
***Note: Jolyon, founder of [http://www.mindat.org/ mindat.org], made a similar chart way before me!
**See the comic on xkcd {{xkcd|1723}}.

===Substitutions 3===
*[[1679: Substitutions 3]]
**This was the third installment of Substitutions and as he did with [[#Substitutions 2|the second]] linking to the first and telling about browser extensions for this he did the same with this one:
**The text:
***(Previously: {{xkcd|1288|Substitutions}} and {{xkcd|1625|Substitutions 2}})
***Note: There are various [https://chrome.google.com/webstore/detail/replacerator/gaajhenbcclienfnniphiiambbbninnp?hl=en browser extensions] for this.
**It was on the main page while the comic was up, for instance here on [https://web.archive.org/web/20160512102325/http://xkcd.com/ 2016-05-12].
**See the comic on xkcd {{xkcd|1679}}.

=== Garden===
*[[1663: Garden]]
**This comic had a header text to help people use the comic when it came out.
**For some time this text was the main header text, but after a while is disappeared from the main header, but remained as the header for Garden.
***See more [[xkcd_Header_text#2016-04-04_-_Protip_on_Garden|below]] or on the Garden page [[Garden#Header_text_after_release|here]]
**Today and as of the newest saved version on the archive from [http://web.archive.org/web/20161231231600/http://xkcd.com/1663/ 2016-12-31] it is still there and says:
***Protip: If you don't like how your garden is growing, you can click to prune it.
***You can copy the URL to share your garden. From other browsers, it will be view-only.
**See the comic on xkcd {{xkcd|1663}}.

===Substitutions 2===
*[[1625: Substitutions 2]]
**This was the second installment of Substitutions and Randall links to the first and tells about browser extensions for this:
**The text:
***(Previously: {{xkcd|1288|Substitutions}})
***Note: There are various [https://chrome.google.com/webstore/detail/xkcd-substitutions/jkgogmboalmaijfgfhfepckdgjeopfhk?hl=en browser extensions] for this.
****He did the same when [[xkcd_Header_text#Substitutions_3|Substitutions 3]] came out, linking to the two previous.
**It was on the main page while the comic was up, for instance here on [https://web.archive.org/web/20160104171722/http://xkcd.com/ 2016-01-04].
**See the comic on xkcd {{xkcd|1625}}.

===United Shapes===
*[[1079: United Shapes]]
**The header was unique for this comic on the day it came out: [https://web.archive.org/web/20120709045709/http://xkcd.com:80/ 2012-07-09].
**The text:
***There's a larger version of this map [http://xkcd.com/1079/large/ here] (Colorado is [http://xkcd.com/1079/colorado/ here]).
***It's also available as a [https://web.archive.org/web/20120709045709/http://store.xkcd.com/xkcd/#StateMap poster].
**The text was never on other pages:
***Before US was released, also on [https://web.archive.org/web/20120709004956/http://www.xkcd.com/ 2012-07-09] the comic [[1078: Knights]] was on the main page, with the previous [[xkcd_Header_text#2012-04-09 -_Standard_text_plus_store_link|promotion of the store]].
***The US version was still on the front the day after [https://web.archive.org/web/20120710063424/http://xkcd.com/ 2012-07-10].
***But the same day [https://web.archive.org/web/20120710114846/http://xkcd.com/1078/ 2012-07-10] the page for Knights did show a new header, which may only have been active on other pages than the front on this day... See details here [[xkcd_Header_text#2012-07-10_-_New:_what-if.xkcd.com|New:_what-if.xkcd.com]]
****Here is another page from [https://web.archive.org/web/20120710095644/http://xkcd.com/1070/ 2012-07-10] with [[1070: Words for Small Sets]], that was also saved that day, so this was on the top of all other comics, except the front page.
**There are simply no version of the front page from the 11th and 12th of July 2012. But from other pages it can be shown that from the 11th there was a difference.
***On [https://web.archive.org/web/20120711223349/http://xkcd.com/1078/ 2012-07-11] on the page for Knights and for instance from the same day on page number [https://web.archive.org/web/20120711223339/http://xkcd.com:80/1077 1077] [[1077: Home Organization]] there is the same but new header, different than the one Knights had both two days before and the other one from the day before.
***And also on [https://web.archive.org/web/20120711123734/http://xkcd.com:80/1079/ 2012-07-11] the numbered page {{xkcd|1079}} for US displays a mix of this new and the unique version of the header text.
****It left our the part about Colorado and moved the bottom line up so the unique part is written in one line (that may still take up two lines as the text will spill over, (maybe just in some browsers?)
****And then it added the two lines of header text that was on all the other pages (presumably also the front page, but that was first proved with the version from [https://web.archive.org/web/20120713154207/http://xkcd.com/ 2012-07-13]).
****And this is the version still shown on {{xkcd|1079}} today, even though the bottom lines was a normal header that was supposed to disappear.
**The final text that is still on US today:
***There's a larger version of this map [http://xkcd.com/1079/large/ here]! It's also available as a [https://store.xkcd.com/collections/posters/products/united-shapes-poster poster].
***New: [https://what-if.xkcd.com/1/ what-if.xkcd.com]: abusing science to answer hypothetical questions.
***I'll answer a new reader question every Tuesday.
****Here above the link has been updated to the one in the current version, where as the above link in the original version, that is now a dead link, has been directed to an archived version of the stores poster.
****The link the new part is to the very first ''[[what if? (blog)|what if?]]'' article ''{{what if|1|Relativistic Baseball}}'' which was released on 2012-07-10, the day after US was released, but before the next comic [[1080: Visual Field]] was released on 2012-07-11.
*****There are no version of comic {{xkcd|1080}} archived while it was on the front page, so it is not possible to tell what the front page looked like on the 11th and 12th of July. But best guess is that it looked like that on Knight shown above from the 11th.
**The first version was on the main page while the comic was up.
***Maybe there was a time with the final version on the front page, but seems like Randall put the new header text there in hand, and forgot to delete it after, so he probably first changed it when the new comic came out.
***Since the new header was important, promoting his new ''what if'' blog, he likely did not wish to have a fairly new page (maybe even on the front page on the 10th) without the reference. Also he did not wish to remove the link to the poster in the store.
***But this makes it a special unique header, as a relic from the past header text is left together with the text that was supposed to be permanent. It should have been deleted when the link to ''what if'' 1 was removed.
**See the comic on xkcd {{xkcd|1079}}.

===Approximations===
*[[1047: Approximations]]
**It has a permanent text saying that many people emailed Randall about another approximation for one year than the one given in the comic.
***As it was already there from the release day on [https://web.archive.org/web/20120425220409/http://xkcd.com:80/ 2012-04-25] it seems unlikely that he actually received those e-mails before changing the header text for this comic!
**The unique text:
***Lots of emails mention the physicist favorite, 1 year = pi x 107 seconds.
***75^4 is a hair more accurate, but it's hard to top 3,141,592's elegance.
**There was a different header on other comics even while this comic was on the front page with the unique text. See [[#2012-04-09_-_Standard_text_plus_store_link|Plus store link]].
**See the comic on xkcd {{xkcd|1047}}.

===Umwelt===
*[[1037: Umwelt]]
**It has a permanent promotion of the store already from the release day on [https://web.archive.org/web/20120401151639/http://xkcd.com:80/ 2012-04-01]:
**The unique text:
***You can get posters, prints, and t-shirts in the [https://store.xkcd.com/ xkcd store].
**It stayed on the front page while this comic was the most recent, so for instance also two days later on [https://web.archive.org/web/20120403223453/http://www.xkcd.com/ 2012-04-03]
***There was a different header on other comics even while this comic was on the front page with the unique text. See [[xkcd_Header_text#2012-03-28_-_Visiting_Newport_News|Visiting Newport News]].
**See the comic on xkcd {{xkcd|1037}}.

===s/keyboard/leopard/===
*[[1031: s/keyboard/leopard/]]
**In response to the idea of having you browser replace keyboard with leopard a reader made a script that could do just that.
**Randall seem to have gotten this script before release (or at least on the day of release) as it was already the header text on [https://web.archive.org/web/20120319130702/http://xkcd.com/ 2012-03-19] the day the comic was released.
**The unique text is:
***A helpful reader has provided an [https://userscripts.org/scripts/show/128626 s/keyboard/leopard/ user script].
****The link does not go anywhere useful any longer, but here is the archived version of the link from two days after the release of the comic on [https://web.archive.org/web/20120321174019/http://userscripts.org/scripts/show/128626 2012-03-21]
**It was never changed on the other comics so was only on the front while this comic was up until 2012-03-21
***Here also shown on the second day it was up on its own page on [https://web.archive.org/web/20120320143916/http://xkcd.com:80/1031/ 2012-03-20].
**The next comic [[1032: Networking]] came out on [https://web.archive.org/web/20120321205835/http://xkcd.com:80/ 2012-03-21] and here the header text has returned to what it was before the leopard comic: [[xkcd_Header_text#2012-03-12_-_xkcd_Holistic_Browser|xkcd Holistic Browser]].
***Here are examples from dates around this showing it was not used on other pages:
****The last archived version of the front page from before the 19th was this version from [https://web.archive.org/web/20120317121834/http://xkcd.com:80/ 2012-03-17], but here is an example from [https://web.archive.org/web/20120318153256/http://xkcd.com:80/1030/ 2012-03-18] (from comic [[1030: Keyed]]), the day before leopard comic came out.
****Both on [https://web.archive.org/web/20120319174700/http://xkcd.com/1030/ 2012-03-19] (from comic [[1030: Keyed]]) and on [https://web.archive.org/web/20120320191039/http://xkcd.com:80/1012 2012-03-20] (from comic [[1012: Wrong Superhero]]) during the time leopard was up, the header text currently in used was still shown.
**See the comic on xkcd {{xkcd|1031}}.

===Making Things Difficult===
*[[996: Making Things Difficult]]
**Randall links to a blog post about cancer as related to this cancer comic
**The unique text:
***Some context for the cancer comics:
***[https://blog.xkcd.com/2011/06/30/family-illness/ https://blog.xkcd.com/2011/06/30/family-illness/]
****The link is for post on his [[Blag]].
****It is on the oldest stored version from [https://web.archive.org/web/20111229043804/http://xkcd.com:80/ 2011-12-29] when it was on the header.
**See the comic on xkcd {{xkcd|996}}.

===Money===
*[[980: Money]]
**Randall notes his thoughts about making it and makes a promotion of the poster.
**The unique text:
***This one was fun (and exhausting) to make.
***There's a poster of it in the [https://store.xkcd.com/products/money-poster store]!
****It is both at the oldest stored version from [https://web.archive.org/web/20120404110059/http://xkcd.com:80/980 2012-04-04] and the newest at time of editing [https://web.archive.org/web/20220108132250/https://xkcd.com/980/ 2022-01-08].
**See the comic on xkcd {{xkcd|980}}.

===Map Projections===
*[[977: Map Projections]]
**Randall notes that a person had birthday on the release of this comic about maps, and this guy has maps on his homepage
**The unique text:
***It turns out Monday was Steve Waterman's birthday. His [https://web.archive.org/web/20111118003418/http://www.watermanpolyhedron.com/ site] has posters of his map, plus maybe the world's only Winkel Tripel-critiquing poetry.
****The link goes to [http://www.watermanpolyhedron.com/ Waterman project] home page. Above the link goes to an archived version from around the time of release of the header text.
****It is at the oldest stored version with the comic on the front page on [https://web.archive.org/web/20111115231643/http://xkcd.com:80/ 2011-11-15].
**See the comic on xkcd {{xkcd|977}}.

===Na===
*[[851: Na]]
**After Randall made this comic, he realized he could have "made it better" and changed the header text to:
***I can't ''believe'' I forgot Hey Jude.
***I don't get do-overs, but I couldn't resist making [https://xkcd.com/851_make_it_better/ a fixed version].
**See more about it in that comics [[851:_Na#Trivia|trivia section]].
**See the comic on xkcd {{xkcd|851}}.

===Malamanteau===
*[[739: Malamanteau]]
**Randall notices that he has changed this comics license, so it can be used on Wikipedia.
**The text:
***At Wikipedia's request, I release this comic under a [https://creativecommons.org/licenses/by-sa/3.0/us/ cc-by-sa] license.
****The link is to the page regarding {{w|Creative Commons license}} in the US.
****Specifically for Attribution-ShareAlike 3.0 United States (CC BY-SA 3.0 US)
*****Usually xkcd is [[Design_of_xkcd.com#License_and_copyright|shared under]] [http://creativecommons.org/licenses/by-nc/2.5/ Creative Commons Attribution-NonCommercial 2.5 License]. This does not allow commercial use, But the 3.0 does.
**When the comic came out it had the normal header text from that time, as seen here two days after release on [https://web.archive.org/web/20100514072436/http://xkcd.com/ 2010-05-14].
***First archived version with the unique text is from [https://web.archive.org/web/20100913003146/http://xkcd.com/739/ 2010-09-13], but the previous archived version of this comic is from [https://web.archive.org/web/20100713160533/http://xkcd.com:80/739/ 2010-07-13].
***So it happened somewhere in the two months in between. But at least it was not there the first two months after release, but there before four month after release.
**See the comic on xkcd {{xkcd|739}}.

===Steal This Comic===
*[[488: Steal This Comic]]
**Randall is tired of {{w|DRM}}, an acronym standing for Digital Rights Management. This comic displays this. He thus make a promotion of Amazon that sells music without DRM.
**The text:
***Note: the [https://www.amazon.com/MP3-Music-Download/b?ie=UTF8&node=163856011 Amazon.com MP3 store] sells DRM-free music. Kudos.
****The link is to Amazon MP3 music. Here is an archived version from [https://web.archive.org/web/20081001083843/http://www.amazon.com/MP3-Music-Download/b?ie=UTF8&node=163856011 2008-10-01], two weeks prior to the release of the comic.
**The header text was on the comic from the release day, here seen the day after on the first archived version from [https://web.archive.org/web/20081014232952/http://xkcd.com/ 2008-10-14].
**See the comic on xkcd {{xkcd|488}}.

===House of Pancakes===
*[[472: House of Pancakes]]
**This comic's header notes its status as a parody:
***(Today's comic is a parody of [https://www.amazon.com/House-Leaves-Mark-Z-Danielewski/dp/0375703764 House of Leaves].)
**Only on the days this comic was the newest was this header featured on the front page of xkcd for instance as seen here the day after release on [https://web.archive.org/web/20080906103932/http://www.xkcd.com/ 2008-09-06].
***But it was only on this comic. The commercial for his new t-shirt was on all the other pages, also on [https://web.archive.org/web/20080906103932/http://www.xkcd.com/ 2008-09-06] and presumably returned to the front page with the next comic. But there is a gap in the archive after this comic.
**See the comic on xkcd {{xkcd|472}}.

==Global header text==
When editing the section, list the changes chronologically with the date of the web archive link and hyperlink each date. Include an internal link to the newest comic at the time of each change and describe the modifications with relevant information. Position the last comic displaying the header text below the other data and place the most recent change at the top.

===2023-11-30 (?) - What If? is now on YouTube!===
**The text:
***What If? is now on YouTube!
***Check out the first video for the answer to
***“What if we aimed the Hubble Telescope at Earth?”
***and follow xkcd’s What If? The Video Series channel to be notified about each new video.

===2023-08-31 - What if? 2 is now available in paperback in the UK!===
*[http://web.archive.org/web/20230831200321/https://xkcd.com/ 2023-08-31]
**[[2822: *@gmail.com]] came out when the header changed.
**The image to the right stayed, but after more than a half year with no text, text was added to the left of the picture because the paper back was available in the UK.
***As opposed to the previous headers this was plain text and not a picture.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The text:
***What if? 2 is [https://xkcd.com/what-if-2/#UK now available] in paperback in the UK!
***what if? 2
**The link goes to https://xkcd.com/what-if-2/#UK, the page on xkcd about the What if? 2 book, and directing to the UK order links where there now also it a paper back version.
*This version was still up in the middle of November 2023 when this segment was updated. And it is now more than 22 month ago that the countdown began, with constant promotion of the book in the header text ever since.

===2023-02-17 - What if? 2 picture only===
*[http://web.archive.org/web/20230217185629/https://xkcd.com/ 2023-02-17]
**[[2739: Data Quality]] came out when the header changed.
**For the first time in a very long time there is no real header text. Only the small red picture with the plane and the title of the what if? 2 book in the right section of the header. As it has been since [[#2022-01-10 - Standard text with countdown|the countdown]] stopped.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The text:
***what if? 2
*This version ended on [http://web.archive.org/web/20230830064414/https://xkcd.com/ 2023-08-30], while [[2821: Path Minimization]] was on the front page, but was replaced by another What If? 2 header.

===2022-09-23 - What if? 2 Instant New York Times Bestseller===
*[https://web.archive.org/web/20220923182825/https://xkcd.com/ 2022-09-23]
**[[2675: Pilot Priority List]] was on the front page when the header changed.
***The header celebrates that the new what if? 2 book has become an instant New York Times bestseller.
**The header kept the same layout as the previous and thus still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at the plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are two lines of text, with the first line in very large bold letters.
**The text:
***what if? 2
***Randall Munroe
***What if? 2
***Instant New York Times bestseller.
***what if? 2
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
*This version ended on [http://web.archive.org/web/20230216181705/https://xkcd.com/ 2023-02-16], while [[2738: Omniknot]] was on the front page, but was replaced by another What If? 2 header,

===2022-09-13 - What if? 2 is available now===
*[https://web.archive.org/web/20220913142432/https://xkcd.com/ 2022-09-13]
**[[2672: What If? 2 Flowchart]] was released as the header changed, even though it was a Tuesday.
***The header and the comic celebrates the release of the new what if? 2 book, that came out on this day.
**The header kept the same layout as the previous and thus still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at the plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are two lines of text, with the first line in very large bold letters
**The text:
***what if? 2
***Randall Munroe
***What if? 2 is available now!
***what if? 2
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
*This thus ended the pre-release promotion of the book, that began on [[#xkcd_Header_text#2022-01-31_-_What_if.3F_2|2022-01-31]], plus of course the three weeks of [[#2022-01-10 - Standard text with countdown|countdown]] before. For a sum total of 8 months and three days.
**It will be interesting to see how long before any reference to what if? 2 will disappear from the header text.
*This version ended on [https://web.archive.org/web/20220922150042/https://xkcd.com/ 2022-09-22], but was replaced by another What If? 2 header, while [[2675: Pilot Priority List]] was on the front page.

===2022-09-12 - One day to What if? 2 comes out===
*[https://web.archive.org/web/20220912125617/https://xkcd.com/ 2022-09-12]
**This was while [[2670: Interruption]] was still up.
**The header is the same layout as the previous and thus still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at he plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are three lines of text. With the first line written in large bold letters. This also has a footnote star. And the footnote is then written to the right in smaller font over five lines of text.
**The text:
***what if? 2
***Randall Munroe
***One day* until what if? 2 comes out!
***<nowiki>*</nowiki>I'm going to spend the day with that Les Mis song stuck in my head, aren't I.
***what if? 2
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
**The foot note refers to the [[2636: What If? 2 Countdown]]. For the date where the header changed 2022-09-12 it was ''F(99) where F(N) means sing all the verses of N Bottles of Beer On the wall followed by F(N-1)'' to release day.
***It is thus for certain this song Randall mentions will now be stuck in his head.
***Les mis song, probably meaning les miserables song, as in a horrible song, he now has stuck in his head for an entire day.
**The header stayed the same until [https://web.archive.org/web/20220913134002/https://xkcd.com/ 2022-09-13].
***This was while [[2671: Rotation]] was still up, early on the release day of the new book.

===2022-09-12 - Three days to What if? 2 comes out===
*[https://web.archive.org/web/20220911102450/https://xkcd.com/ 2022-09-11]
**This was while [[2670: Interruption]] was still up.
**The header is the same layout as the previous and thus still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at he plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are three lines of text. With the first line written in large bold letters. This also has a footnote star. And the footnote is then written to the right in smaller font over five lines of text.
**The text:
***what if? 2
***Randall Munroe
***Three days* until what if? 2 comes out!
***<nowiki>*</nowiki>Assuming it's still Saturday. I'm a static png image and can't perceive time.
***what if? 2
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
**The header only stayed the same for one day and [[2670: Interruption]] was still up when it changed to the next.

===2022-09-07 - Less than one week to What if? 2 comes out===
*[https://web.archive.org/web/20220907211736/https://xkcd.com/ 2022-09-07]
**This was while [[2668: Artemis Quote]] was still up.
**The header still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at he plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are four lines of text. With the middle line written in large bold letters. This also has a footnote star. And the footnote is then written to the right in smaller font over four lines of text.
**The text:
***what if? 2
***Randall Munroe
***Less than one week* until what if? 2 comes out!
***<nowiki>*</nowiki>Oh no, now I have that song stuck in my head.
***what if? 2
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
**The foot note refers to the [[2636: What If? 2 Countdown]]. For the date where the header changed 2022-09-07 it was ''one pico-universe-lifetime'' to release day. But the next day 2022-09-08 it was ''The Baby Shark chorus for a family of 50,000 sharks''.
***It is thus for certain this song Randall mentions will now be stuck in his head.
**The header stayed the same until [https://web.archive.org/web/20220910024549/https://xkcd.com/ 2022-09-10].
***This was while [[2670: Interruption]] was up.

===2022-08-27 - Preorder What if? 2 - with image - again===
*[https://web.archive.org/web/20220827232205/https://xkcd.com/ 2022-08-27]
**[[2664: Cloud Swirls]] came out when it changed.
**The header [[#2022-08-16 - Preorder What if? 2 - with image|changed back]] to the preorder image from the previous header, when Randall's book tour ended. See the link.
*It ended on [https://web.archive.org/web/20220906191403/https://xkcd.com/ 2022-09-06].
**This was while [[2668: Artemis Quote]] was up.

===2022-08-17 - What if? 2 book tour===
*[https://web.archive.org/web/20220817161136/https://xkcd.com/ 2022-08-17]
**[[2659: Unreliable Connection]] was out when it changed.
**The header still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. Inside this there is text to the left. Then Cueball is seen flying by holding on to a single balloon (like in [[1110: Click and Drag]]). He flies over five mountain peaks with snow, with three clouds and three distant birds in front of him, as he drifts to the right, as shown with movements lines behind him. In front of him is a dark feature at the bottom of the frame. Above this is a blue square (like a button) with white text.
**The text:
***I'm going on a what if? 2 book tour!
***Click to see where
***what if? 2
****The image to the left is a link to [https://xkcd.com/events/ randall munroe: events] page on xkcd. Which at the time showed the calendar with the planned stop for his book tour, which covered the US and London.
****As always the link button in blue is not the only part of the image that is a link, as he just mentioned in the [[#2022-08-11 - Preorder What if? 2 - with image|previous header text]], and several times before...
****The right image is a link that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
*This header thus continues the promotion of the new book, which was at the time was only 27 days away (or [[2636:_What_If%3F_2_Countdown|6 dog months]]).
**It will be interesting to see how long it takes before promotion for the book disappears from the header. It may still take months.
*The header stayed the same until [https://web.archive.org/web/20220826202043/https://xkcd.com/ 2022-08-26].
**This was while [[2663: Tetherball Configurations]] was up.

===2022-08-11 - Preorder What if? 2 - with image===
*[https://web.archive.org/web/20220811055445/https://xkcd.com/ 2022-08-11]
**[[2657: Complex Vowels]] came out as it changed.
*The message in the header was not really changed, but the meaning of the text from the previous header was now written in an image, although the text did change somewhat.
**The header thus still consist of two parts. To the left the new image with an picture of the book and text. And to the right the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The new image to the left has a black border. Inside this to the right is the new text. To the left is a picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at he plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text.
**The text:
***what if? 2
***Randall Munroe
***Preorder what if? 2 and enter for a chance to win a comic inspired by your question! Click here to learn more. Or click wherever. This whole image is a link because html is hard.
***what if? 2
****In the left image there is a blue link font on the word "here" in click here. However the entire left image is a link to the [https://sites.prh.com/whatif2 what if 2 contest]. As explained he did not only make the word a link because html is hard! This is something Randall [[xkcd_Header_text#2014-07-23_-_what_if.3F_book_tour|often comments on]].
*****The link in the text goes to a contest page that starts with the words:
*****[https://web.archive.org/web/20220718171904/https://sites.prh.com/whatif2 Want Randall Munroe to answer you What If? question?]
*****Here above the web archive version of the link, in case the link from the text goes dead in the future.
****The right image is a link that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
**The header stayed the same until [https://web.archive.org/web/20220816124823/https://xkcd.com/ 2022-08-16].
***This was while [[2659: Unreliable Connection]] was up.

===2022-07-19 - Preorder What if? 2===
*[https://web.archive.org/web/20220719153239/https://xkcd.com/ 2022-07-19]
**[[2647: Capri Suns]] came out as it changed.
*The header looked a lot like the previous one, only part of the text changed.
**The header thus still consist of two part. To the left a line of text (split up, most likely over four lines for most users). And to the right the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
**The text:
***Preorder What If? 2 (all US preorders eligible) and [https://sites.prh.com/whatif2 enter our contest] for a chance to win a dedicated comic and What If blog post!
***what if? 2
****The image is a link that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
***The link in the text goes to a contest page that starts with the words:
****[https://web.archive.org/web/20220718171904/https://sites.prh.com/whatif2 Want Randall Munroe to answer you What If? question?]
****Here above the web archive version of the link, in case the link from the text goes dead in the future.
**The header stayed the same until [https://web.archive.org/web/20220810034709/https://xkcd.com/ 2022-08-10].
***This was while [[2656: Scientific Field Prefixes]] was up.

===2022-01-31 - What if? 2===
*[https://web.archive.org/web/20220201000434/https://xkcd.com/ 2022-02-01]
**[[2575: What If? 2]] came out as it changed, and then it [https://www.explainxkcd.com/wiki/images/3/36/Countdown_in_header_text_page_when_what_if_comic_came_out.png looked like this] already on 2022-01-31. But there is no archived version from that day after the header changed.
***This was what [[#2022-01-10 - Standard text with countdown|the countdown]] had been counting down to.
***An announcement that Randall had written a sequel to the first ''[[What If? (book)|What If?]]'' book, based on his blog.
**The header consist of two part. To the left a line of text (split up, most likely over three lines for most users). And to the right the window also used in the countdown, but with the image that appeared in it after the count down ended.
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plan ia the book title in white text.
**The text:
***What If? 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions comes out 9/13. Preorder [https://xkcd.com/what-if-2/ here!]
***What If? 2:
****The link goes to a dedicated page on xkcd about what if? 2: the book. The image is also a link to this page.
****The entire comic that came out along with the new header text is also a link to that page.
**At the same time the [[Design_of_xkcd.com#xkcd_links|xkcd links]] in the top left section of xkcd also changed to include links to books, and especially this new book.
*It will be interesting to see how long this version of the promotion for the new books stays up. But most likely there will be promotion for the book until release, and then more after the release.
**The header stayed the same until [https://web.archive.org/web/20220718145816/https://xkcd.com/ 2022-07-18], for more than 5,5 month. This was while [[2646: Minkowski Space]] was up.
***The change was rather small, but part of the text changed. The promotion continued though.

===2022-01-10 - Standard text with countdown===
*[https://web.archive.org/web/20220110183238/https://xkcd.com/ 2022-01-10].
**[[2565: Latency]] was still up when the [[Countdown in header text]] was added.
**The text was still the standard xkcd header: xkcd updates every Monday, Wednesday, and Friday.
**But a countdown was added. This was inserted in a rectangular box, placed at the end of the standard header text.
***In some browsers the box forces the last word "Friday" to jump down to the next line.
**Inside the box the following time was displayed in the version in the link:
***20d 20h 27m
****This clock will also count down every minute, although it will return to the time at the time of archive when reloaded!
****While this was edited into this wiki the time had changed to 20d 19h 12m. So it was a very fresh download in the web archive, only about 1 hour old when it was updated to this wiki.
****The minutes change without refreshing the page, and follows this editors computers clock exactly, so it will end at 59 minutes, not at a full hour.
***It looks like it started on [https://munvoseli.github.io/xkcd-countdown/ 01-10 17:00 UTC].
****A calculation shows that this countdown will reach zero on Monday 2022-01-31 at 14:59 (2:59 PM) {{w|UTC}}.
****This will be at 9:59 (9:59 AM) in [[Randall]]'s home town
*****The last ten minutes it switched to seconds for the last minute so it made the switch 15:00 UTC 10:00 in Boston!
****From that it can be deduced that the count started at 20d 22h 0m
*****The first image on the archive thus came 1h 33m after the count began.
**At [https://web.archive.org/web/20220111153818/https://xkcd.com/ 2022-01-11] a diagonal black bar appeared in the lower left-hand corner of the countdown box.
***After that the [[Countdown in header text]] page was created and any further development on the count down will be mentioned on that page.
*It was last up on [https://web.archive.org/web/20220131124817/https://xkcd.com/ 2022-01-31] when [[2574: Autoresponder]] was on the front page.
**This archived version was when the counter was at 0d 2h 11m, and the last normal frame was already up at this time.
***It stayed like this until the [https://www.explainxkcd.com/wiki/images/1/17/Countdown_in_header_text_page_0_seconds.png counter ran out].
****Then for a few minutes the final frame, that revealed that all this was a promotion for Randall's new book what if? 2 was up [https://www.explainxkcd.com/wiki/images/4/48/Countdown_in_header_text_page_just_after_countdown.png while the Friday comic was still up].
****Then when the new Monday comic came out with the promotion for what if? 2, the header changed.

===2022-01-08 - Back to standard text===
*[https://web.archive.org/web/20220108044654/https://xkcd.com/ 2022-01-08].
**[[2565: Latency]] came out around the time the new header text appeared, on a Friday!
**The text returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**This was the first time since [[#2018-11-07 - Back to standard text|2018-11-07]] that the text had changed back to that, and at that time it lasted until 2019-02-05.
***That is 1067 days (less than a month short of three years) without the standard text! (Can it be called standard anymore?)
**It was only left in the complete standard version until [https://web.archive.org/web/20220109030513/https://xkcd.com/ 2022-01-09] when Latency was still on the front page.
***Then the next day a [[#2022-01-10 - Standard text with countdown|countdown]] was added to it.
****That was after the weekend on Monday but before the Monday comic came up.
****So only during the weekend was it normal standard header text.

===2021-12-20 - What If in stock===
*[https://web.archive.org/web/20211220211220/https://xkcd.com/ 2021-12-20].
**[[2557: Immunity]] came out around the time the new header text appeared.
**The text:
***For anyone trying to find What If? this year, it's in stock at [https://www.barnesandnoble.com/w/what-if-serious-scientific-answers-to-absurd-hypothetical-questions-randall-munroe/1118864093 Barnes & Noble], [https://m.booksamillion.com/p/What-If/Randall-Munroe/9780544272996 Books-a-Million], and [https://bookshop.org/books/what-if-serious-scientific-answers-to-absurd-hypothetical-questions-9781483041827/9780544272996 Bookshop]
**Each store name is a link to the corresponding store's page for ''[[What If? (book)|What If?]]''.
*It was last seen on [https://web.archive.org/web/20220106100957/https://xkcd.com/ 2022-01-06] when [[2564: Sunshield]] was up.

===2020-06-03 - Black Lives Matter===
*[https://web.archive.org/web/20200604003700/http://xkcd.com/ 2020-06-03].
**[[2315: Eventual Consistency]] came out as a new header text was finally inserted after almost two months without one.
**Cueball is standing to the left and speaks a single line of text: "Black Lives Matter"
**To the right is a gray link button with text: "[https://www.joincampaignzero.org/ How To Help]."
**As always, the entire image (which is only below the xkcd logo) is a link
***The button is thus not needed, but it will also work when clicking the location of the button.
**The link goes to [https://www.joincampaignzero.org/ Join Campaign Zero].
***{{w|Black Lives Matter}} is a loose, grassroots, decentralized confederation of groups and individuals advocating for racial justice. It arose in 2013 after the acquittal of {{w|George Zimmerman}}, who took the life of {{w|Trayvon Martin}}.
***Randall's featuring Black Lives Matter came on the heels of the {{w|Killing of George Floyd}} on May 25th 2020, which had sparked {{w|George Floyd protests|protest in the US}}
***Floyd died while saying "{{w|I can't breathe}}," which was already used due to other Black men's killings, the first was from the {{w|Killing of Eric Garner}}, back in 2014.
*It stayed like this until [https://web.archive.org/web/20200616114945/https://xkcd.com/ 2020-06-16] when [[2320: Millennium Problems]] was up.
**Then on [https://web.archive.org/web/20200617131438/https://xkcd.com/ 2020-06-17] the link changed to [https://blacklivesmatter.com/ Black Lives Matter]. [[2320: Millennium Problems]] was still on the front page on that day.
*On April 1st 2021 the front page header changed to mention who made the April Fools' comic.
**But this was only for this comic [[#Checkbox|Checkbox]].
**The rest of the pages kept the BLM header and it returned to this on the front page once the next comic was released on April 5th. At that time it will have been up for 13 months, making it the longest header different from the standard header.
*It was last up on [https://web.archive.org/web/20211219202204/https://xkcd.com/ 2021-12-19] when [[2556: Turing Complete]] was on the front page.
**At that time it had been up for 564 days or 1,5 year plus 16 days! This is most likely a record.

===2020-04-05 - Empty header===
*[https://web.archive.org/web/20200405042955/https://xkcd.com/ 2020-04-05].
**[[2289: Scenario 4]] came out and the header belonging to the previous comic was removed.
**But no new header was inserted. Not even the go to [[#Header text|Header text]] about the release days of xkcd.
***Since the previous header was related only to the [[:Category:April fools' comics|April fools' comic]] [[2288: Collector's Edition]], and that had stopped the promotion of the [[How To]] book, after first experiencing problems with it's release, it seems Randall forgot what he usually put in the header.
*It stayed empty like this until [https://web.archive.org/web/20200602213017/https://xkcd.com/ 2020-06-02] when [[2314: Carcinization]] was on the front page.
**So almost two month without a header. This had not happened before.

===2020-04-04 - Put together by===
*[https://web.archive.org/web/20200404014814/http://xkcd.com/ 2020-04-04].
**[[2288: Collector's Edition]] came out and the header changed.
**The text:
***Today's comic was put together by [https://chromakode.com/ Max Goodhart], [https://twitter.com/Aiiane Amber], [https://twitter.com/bstaffin Benjamin Staffin], [https://twitter.com/cotrone Kevin], [https://www.instagram.com/fading_interest/ @fading_interest], [https://twitter.com/wirehead2501 Kat], [https://twitter.com/zigdon @zigdon], and Christopher Night.
****All names have links except the last.
**It thanks those that helped Randall create this years [[:Category:April fools' comics|April fools' comic]], which had taken two extra days before it was released due to the complex nature of the comic.
*Due to the delay the next comic, [[2289: Scenario 4]], was released already the day after the Fool's comic, even though it was thus [[2289:_Scenario_4#Trivia|on a Saturday]]!
**Since this header was related only to the Fool's comic, it was thus removed from the general header, but it stayed up as [[#Collector.27s_Edition|one of]] the permanent [[#Unique_header_text|unique header texts]].
***However, when it was removed from the general header, the header was left empty.
***Unlike some other headers that stayed on a given comic, this one was on all comics for the duration of the time it stayed on the front page, see for instance the previous comic on [https://web.archive.org/web/20200403232031/https://xkcd.com/2287/ 2020-04-03].

===2020-04-02 - Technical Reasons===
*[https://web.archive.org/web/20200402234828/https://xkcd.com/ 2020-04-02].
**[[2287: Pathogen Resistance]] was up when the header changed.
*Randall turned out to, again, have problems with his complicated and interactive [[:Category:April fools' comics|April fools' comic]] for 2020.
**The text:
***Note: For technical reasons Wednesday's comic will be posted Thursday instead. Apologies for the delay!
*This finally stopped the promotion of the [[How To]] book.
**It had then been part of the header for well over a year since [http://web.archive.org/web/20190206060904/https://xkcd.com/ 2019-02-06].
*It stayed up a day longer than planed as the fool's comic, [[2288: Collector's Edition]] was first released on Friday, so the note was still up on [https://web.archive.org/web/20200403012612/https://xkcd.com/ 2020-04-03].
**[[2287: Pathogen Resistance]] thus stayed two extra day on the front page, and the third comic of that week, [[2289: Scenario 4]] was released already the day after the Fool's comic, even though it was thus [[2289:_Scenario_4#Trivia|on a Saturday]]!

===2020-01-16 - How To explores - again===
*[https://web.archive.org/web/20200116190038/https://xkcd.com/ 2020-01-16].
**[[2255: Tattoo Ideas]] was still up when the header changed.
**The ongoing promotion of the book continued but here more than three weeks after Christmas the reference to Christmas was removed.
**The header then returned to the one from before Christmas:
***[[#2019-11-22 - How To explores|How To explores]] - see that for all other details.
*It was last up on [https://web.archive.org/web/20200401221435/https://xkcd.com/ 2020-04-01] when [[2287: Pathogen Resistance]] was on the front page.
**It was the problems with [[:Category:April fools' comics|April fools' comic]] of 2020 that finally stopped the promotion of the [[How To]] book.
**It had then been part of the header for well over a year since [http://web.archive.org/web/20190206060904/https://xkcd.com/ 2019-02-06].

===2019-12-02 - Into Science===
*[https://web.archive.org/web/20191202223745/https://xkcd.com/ 2019-12-02].
**[[2236: Is it Christmas?]] came out when the header changed. Fitting as the change is about Christmas list.
**Still promoting the new [[How To]] book, continuing to make the image a link to the [https://xkcd.com/how-to/ How To book] page on xkcd.
***The links below to order are the same as in the previous header.
***Actually most of the header stays the same with the same four images and the same layout. But the text above has changed completely and the two main text sections between the drawings has changed but only slightly. The description of the images is thus left out, see below. Only new thing is that there are now two red circles connected with a red arrow. The first circle is around the word How To at the end of the first text with the arrow going from that circle to the second circle drawn around the picture of the book.
**The text:
***Is there someone on you Christmas list who's into science? They might like my new book '''''How To'''''
***It explores ridiculous ideas for applying scientific research to everyday problems...
***...And illustrates what would happen if you tried them.
***''Boom''
***You can get it here:
***[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound], [https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target]
*It was last up on [https://web.archive.org/web/20200115155040/https://xkcd.com/ 2020-01-15] when [[2255: Tattoo Ideas]] was on the front page.

===2019-11-22 - How To explores===
*[https://web.archive.org/web/20191122214439/https://xkcd.com/ 2019-11-22].
**[[2232: Hotel Room Party]] was up when the header changed. It most likely changed when the comic appeared. Earlier on that day it was the previous header over the previous comic.
**Still promoting the new [[How To]] book, here again making the image a link to the [https://xkcd.com/how-to/ How To book] page on xkcd, after it previously was a link to where to listen to the audio book.
***The links below to order returns to the same as in the header before the previous header with links to audio books, except that the link to an exclusive edition has been removed.
***The header consist of an image with text above five small drawings with two text parts in between them. To the left is the closed How To book which is black with a blue readable title, How To, and unreadable white text below this as well as below the unreadable blue author name, which are below the image. The image shows Cueball putting in a light-bulb with drones under each foot while Megan, holding a ladder, and White/Black Hat are looking up at him. To the right of the book is a drawing of Ponytail pole-vaulting with two black helium filled balloons. Next to her is the first text segment. Then after that is the drawing, seen before in the header text, of a truck towing a house up a steep hill. This truck goes above the second text segment, with Cueball somersaulting above the text. Furthest right, above and just right of the text is an explosion with the sound written inside. Below the header image is some black text and then the links to where to get it as regular blue link text.
**The text:
***My new book '''''How To''''' explores the science behind spacecraft heat shields, butterfly metabolisms, and land border surveys...
***...By imagining ridiculous ideas for applying the research to you everyday life...
***...And illustrating what would happen if you tried them.
***''Boom''
***You can get it here:
***[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound], [https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target]
*It was last up on [https://web.archive.org/web/20191201191025/https://xkcd.com/ 2019-12-01] when [[2235: Group Chat Rules]] was on the front page.

===2019-11-06 - Audio clip===
*[https://web.archive.org/web/20191106204314/https://xkcd.com/ 2019-11-06].
**[[2224: Software Updates]] was still up when the header changed, but the first archive version was first from after the next comic came out [[2225: Voting Referendum]].
**Still promoting the new [[How To]] book, here making the image a link to the How To book on Penguin Random House's audio book, where an audio clip read by Wil Wheaton can be sampled.
***The links below to order have now changed to those with audio books.
***The header consist of an image with text, with a "blue link", above the How To book that is being folded out from closed; to partially open; to opened up on two full pages; this takes three images. The closed book is the black book with a blue readable title, How To, and unreadable white text below this as well as below the unreadable blue author name, which are below the image. The image shows Cueball putting in a light-bulb with drones under each foot while Megan, holding a ladder, and White/Black Hat are looking up at him. The partly open book still has this cover partly visible, but unreadable, as well as come unreadable text in the open side. The open book shows two pages with lots of unreadable text and three figures (maybe one is a table). Next to the open book there is an arrow to the right pointing at an audio icon with three audio lines in front. Below the header image are the links as regular text.
**The text:
***You can click here to hear a clip from the audio version of '''''How To''''', read by Wil Wheaton.
***[https://books.apple.com/us/audiobook/how-to-absurd-scientific-advice-for-common-real-world/id1475319694 Apple], [https://www.audiobooks.com/audiobook/how-to-absurd-scientific-advice-for-common-real-world-problems/369279 Audiobooks], [https://www.audible.co.uk/pd/How-To-Audiobook/1473680360?qid=1574679523&sr=1-1&pf_rd_p=c6e316b8-14da-418d-8f91-b3cad83c5183&pf_rd_r=DX3EZ14M14CFQPP9GHJY&ref=a_search_c3_lProduct_1_1 Audible], [https://play.google.com/store/books/details/Randall_Munroe_How_To?id=LzSGDwAAQBAJ Google Play], and [https://libro.fm/audiobooks/9780525635680 Libro.fm]
**The entire image is a link to the [https://www.penguinrandomhouseaudio.com/book/576760/how-to/ How To book on Penguin Random House] page, where the audio clip can he played.
***As always it is the entire picture that is a link, and not only the blue underlined text that says click here!
*It was last on the archive on [https://web.archive.org/web/20191122044456/https://xkcd.com/ 2019-11-22] when [[2231: the Time Before And After Land]] was on the front page. But it was most likely still up when [[2232: Hotel Room Party]] came out. But then changed during the next day.

===2019-10-02 - Horse vs football team===
*[https://web.archive.org/web/20191002005854/https://xkcd.com/ 2019-10-02].
**[[2210: College Athletes]] was up when the header changed.
**Still promoting the new [[How To]] book, but seeing this is no longer close to the release day the focus has changed. This time the image seems to be from one of the How To explanations in the book.
***The links below to order are the same as the previous header.
***But new text is added after the links to promote two events with Randall in New York the two days after this header came up.
****These links disappeared after a week leaving only the picture and the link to buy the book. See below.
***The header consist of an image with Cueball riding bareback on a horse. He comes from the left holding an American football. Running towards him from the right are eight American football players with helmets with three stars on the back of the helmet. Two of the players at the back are almost hidden by players in front of them. Beneath them is a line of text that belongs to the image, the period at the end of the sentence hangs in height with the center line of the last letter E... Then below the image follows the link and promotion of the NY events, these are written in regular.
**The text:
***My new book ''How To'' is out now! You can get it here.
***[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [https://www.barnesandnoble.com/w/how-to-randall-munroe/1130494832?ean=9780525686910#/ B&N Exclusive Edition], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound], [https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target] I'll be at New York Comic Con! I'm giving [https://www.newyorkcomiccon.com/Explore/Panels/Panels-And-Screenings/#/event/how-todo-anything-with-randall-munroe-creator-of-xkcd a talk on Thursday], and on
***Friday [https://smbc-comics.com/ Zach Weinersmith] and I will be hosting [https://www.caveat.nyc/event/how-to--absurd-scientific-advice-for-common-real-world-problems-10-4-2019 an event at Caveat NYC].
**The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
***The link to Target still seems to go the main page rather than to [https://intl.target.com/p/how-to-by-randall-munroe-hardcover/-/A-76508342 their How To book page]... Probably a still undiscovered error on Randall's part?
*This header changed, but so slightly that the changes will only be mentioned here rather than in a new section:
**The first link was last active on [https://web.archive.org/web/20191004014438/https://xkcd.com/ 2019-10-04]
**Then the day after only the second link remained from [https://web.archive.org/web/20191005041539/https://www.xkcd.com/ 2019-10-05]. [[2211: Hours Before Departure]] came out when it changed.
***But the text of this link changed as it had been a continues text from one to the other link. Also it was not entirely on it's own line, thus not as with the first link whose text was directly connected to the line with the links to buy the book.
***The new text of that link was:
****[https://smbc-comics.com/ Zach Weinersmith] and I will be hosting [https://www.caveat.nyc/event/how-to--absurd-scientific-advice-for-common-real-world-problems-10-4-2019 an event] Friday night at Caveat NYC!
****The last link was the same, but now it only covered two words not the entire end of the sentence.
***This other link was last active on [https://web.archive.org/web/20191007042707/https://xkcd.com/ 2019-10-07].
**And then the last link was gone by [https://web.archive.org/web/20191008053609/https://xkcd.com/ 2019-10-08], when [[2212: Cell Phone Functions]] came out.
*It ended on [https://web.archive.org/web/20191105164001/https://xkcd.com/ 2019-11-05] when [[2224: Software Updates]] was up.

===2019-09-30 - Tons of fun===
*[https://web.archive.org/web/20190930234245/https://xkcd.com/ 2019-09-30].
**[[2209: Fresh Pears]] was up when the header changed.
**Still promoting the new [[How To]] book, but seeing this is no longer close to the release day the focus has changed to how much fun it was for Randall to write it and how proud he is of the result. Randall, as Cueball, is saying this in the new header image.
***The links below to order are the same, except a new has been added at the end.
***The header consist of an image with Cueball standing to the left of the book, shown as tall as he is. The book is opened up on two pages with lots of unreadable text as well as three drawings, only one of these, with a circle diagram, can clearly be seen. Cueball is speaking, and the text is above him and the book. Two words are blue with a line under as if they where a link. But as always the entire image is a link. Beneath the image is the links on where to order the book.
**The text:
***Writing my new book '''''How To''''' was tons of fun and I'm so proud of the result. It's out now-Click Here to order!
***Order: [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [https://www.barnesandnoble.com/w/how-to-randall-munroe/1130494832?ean=9780525686910#/ B&N Exclusive Edition], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound], [https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target]
**The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
***The new link to Target seems to go the main page rather than to [https://intl.target.com/p/how-to-by-randall-munroe-hardcover/-/A-76508342 their How To book page]... Probably an error on Randall's part.
*It ended on October 2nd while [[2210: College Athletes]] where up. But there is no archived versions from the 1st of October and the one from the 2nd is with the next version. But the editor of this was making changes to the explanation of College Athletes before the next header change came along.

===2019-09-11 - How To available===
*[https://web.archive.org/web/20190911053115/https://xkcd.com/ 2019-09-11].
**[[2200: Unreachable State]] was still up when the header changed.
**The release day part of the promotion was changed to telling that the new [[How To]] book was available. With teasers about what is in the book below the heading. On either side of the text a picture of the book is still shown. Also the links below changed, adding three new and removing one old.
***The header consist of an image with the book shown both left and right of some text. Both books have blue title and author name, and white unreadable title and white drawing of Cueball flying on two quadcopters to put in a light-bulb in a ceiling lamp, while White/Black? Hat is watching together with Megan, who is holding a ladder. Beneath the image is the links on where to order it.
***Between the two books are two sections of text above each other, the lover with smaller font.
**The text:
***How To is available now!
***Learn how to open bottles with nuclear weapons and how to be on time for meetings by altering the Earths rotation. The book also features advice from real-life experts including Chris Hadfield and Serena Williams.
***Order: [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [https://www.barnesandnoble.com/w/how-to-randall-munroe/1130494832?ean=9780525686910#/ B&N Exclusive Edition], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible]
**The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
**{{w|Serena Williams}} is a famous tennis player who was also featured in one of the [[:Category:Book promotion|promotion comics]] for How To: [[2190: Serena Versus the Drones]]
**{{w|Chris Hadfield}} is a Canadian retired astronaut, engineer, and former Royal Canadian Air Force fighter pilot. The first Canadian to walk in space, Hadfield has flown two Space Shuttle missions and served as commander of the International Space Station.
***The new link to audible probably needs the user to be signed up, else it will go to the front page and ask yo to sign up. But from the archive the page can be seen [https://web.archive.org/web/20190923004816/https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 here].
*Up till [https://web.archive.org/web/20190922143253/https://xkcd.com/ 2019-09-22] it looked like this.
**Then on [https://web.archive.org/web/20190923145251/https://xkcd.com/ 2019-09-23] and extra link was added after Audible:
***[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target].
**[[2205: Types of Approximation]] was up when this change occurred during a weekend.
*It ended on [https://web.archive.org/web/20190929223547/https://xkcd.com/ 2019-09-29] when [[2208: Drone Fishing]] was up.

===2019-09-04 - Happy Release Day - bookstore===
*[https://web.archive.org/web/20190904051509/https://xkcd.com/ 2019-09-04].
**[[2198: Throw]] was already up when the header changed slightly, as the text below Happy release day changed.
*Most of the header stayed the same as the [[#2019-09-03 - Happy Release Day - calendar|day before]], but the reference to the Gregorian/Julian calendar was changed.
**The header consist of an image with the book shown both left and right of some text.Both books have blue title and author name, and white unreadable title and white drawing of Cueball flowing on two quadcopters to put in a light-bulb in a ceiling lamp, while White/Black? Hat is watching together with Megan comes who is holding a ladder. Beneath the image is the link on where to order it, now the preorder has been changed to order.
***Between the two books are two sections of text above each other, the lover with smaller font and in brackets.
**The text:
***Happy How To release day!
***Available wherever books are sold.
***(Mostly bookstores, I assume but you can always try your luck at Wendy's.)
**See below for any other details.
*It ended on [https://web.archive.org/web/20190909211737/https://xkcd.com/ 2019-09-09] when [[2200: Unreachable State]] was up.

===2019-09-03 - Happy Release Day - calendar===
*[https://web.archive.org/web/20190903051503/https://xkcd.com/ 2019-09-03]
**[[2197: Game Show]] was still up when the header changed, but it was for sure to coincide with [[2198: Throw]] which came out later on the release day while it still looked like in this version.
**Randall celebrated the release day of [[How To]], coming out the day the header changed.
***The comic is also a reference to a chapter in the book on how to throw things. A very complicated interactive comic where different persons or other living things can be chosen to throw dead or living things. The trow will then be shown below with distance measured in two units, normal and special. That is if the thrower can actually manage to throw the thing.
**The header consist of an image with the book shown both left and right of some text. The two black books have red stars around them, five on the outer side of the image and 6 on the inner, the stars are mirrored around left and right book. Both books have blue title and author name, and white unreadable title and white drawing of Cueball flying on two quadcopters to put in a light-bulb in a ceiling lamp, while White/Black? Hat is watching together with Megan, who is holding a ladder. Beneath the image is the link on where to order it, now the preorder has been changed to order.
***Between the two books are two sections of text above each other, the lover with smaller font and in brackets.
**The text:
***How To Randall Munroe
***Happy How To release day!*
***(*Gregorian calendar. The Julian edition doesn't come out for 13 more days.)
***How To Randall Munroe
***Order: [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
**The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
**Most of the world uses the {{w|Gregorian calendar}}, but before it was taken into use, the {{w|Julian calendar}} was in use.
***The Julian calendar does not take into account that every 100 years a leap year should be passed as in the Gregorian calendar, and thus it is at the moment 13 days behind, as it has has this many February 29th too many. Since there should actually be a leap year every 400 year, and the last of those was 2000, then it has been 13 days since 1900, and will stay like this until 2100 when it will become 14 days.
***The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
**Already the next day the part of the header below happy release day about the Gregorian calender changed. See [[#2019-09-04 - Happy Release Day - bookstore|above]].

===2019-08-27 - Out in a week===
*[https://web.archive.org/web/20190827082224/https://xkcd.com/ 2019-08-27].
**[[2194: How to Send a File]] was up when the header changed.
**Randall continues to promote his new book, [[How To]], coming out a week from this header.
***It is only three lines of text
**The text:
***My new book, How To, comes out next week!
***Read an exclusive excerpt about transmission [https://blog.xkcd.com/2019/08/26/how-to-send-a-file/ here].
***[Four links in gray blue are given with the first words in black:] Preorder ''How To'': [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
**Later [https://web.archive.org/web/20190827184229/https://xkcd.com/2194/ on the same day], (and here for the next day [https://web.archive.org/web/20190828095401/https://xkcd.com/ 2019-08-27] for the front page), more text and links where added, plus the order of the text was changed.
**The later text was:
***My new book, [https://xkcd.com/how-to/ How To], comes out in a week! ([https://blog.xkcd.com/2019/08/23/book-tour-and-contest-winner/ Book tour info])
***You can preorder it now to get a copy when it's released:
***[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
***You can also read an exclusive excerpt about file transfers [https://blog.xkcd.com/2019/08/26/how-to-send-a-file/ here].
**The link to the book tour also include the winner of the [[#2019-06-25 - People with books|contest]] to get Randall to add "your" city to his book tour.
***The winner was {{w|Juneau, Alaska}}.
*It ended on the release day 2019-09-03, so this was last on the page on [https://web.archive.org/web/20190902042108/https://xkcd.com/ 2019-09-02].

===2019-08-06 - Win a sketch===
*[http://web.archive.org/web/20190806052948/https://xkcd.com/ 2019-08-06].
**[[2185: Cumulonimbus]] was up when the header changed.
***Most likely the header changed when that comic came out on 2019-08-05. But the previous header was also out during that day.
**Randall continues to promote his new book, [[How To]], now making a competition where you can win a stick figure sketch of yourself. (Although only for US residents!)
***The image shows Hairy, with a cat at his feet and Megan (or Danish?) with a samurai sword. They are standing with their backs towards each other, the cat on the left, Megan facing right with the sword towards the words.
***Below the drawing are links to places to preorder the book.
**The text:
***Want to win a sketch of yourself as a stick figure? [https://blog.xkcd.com/2019/08/05/win-an-xkcd-sketch/ Click here] to find out how!
***[Four links in gray blue are given with the first words in black:] Preorder ''How To'': [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
****The entire picture is a [https://blog.xkcd.com/2019/08/05/win-an-xkcd-sketch/ link] to a [[Blag]] post: ''Win an xkcd sketch''
****That is even though only the click here part of the text is in blue, like a link.
****Cause as he often has written: I still haven't figured out HTML imagemaps, most recently in the [[#2019-07-09 - Drawings from How To|2019-07-09]] header.
*The header stayed like this until [https://web.archive.org/web/20190826062701/https://www.xkcd.com/ 2019-08-26] when [[2193: Well-Ordering Principle]] was up.

===2019-08-03 - First look inside===
*[http://web.archive.org/web/20190803222711/https://xkcd.com/ 2019-08-03].
**[[2184: Unpopular Opinions]] was up when the header changed.
**Randall continues to promote his new book, [[How To]], now stating that it comes out next month.
***Set to be released on September 3rd 2019, this update was made exactly one month before.
***The image shows text to the left of three drawings of the book: First the closed book showing the black front cover with blue and white text and white drawings, then the book is partly opened, and finally it lays opened up showing two pages, with a readable heading on the right page.
***Below the drawing are links to places to preorder the book.
**The text:
***My new book comes out next month. Click here for a first look inside!
***[On the books front cover only two thins can be read:]
****How To
****Randal Munroe.
***[These two words can also partly be read on the opening book.]
***[Only the large heading can be read on the right page of the open book:]
****How to Dig a Hole.
***[These two pages also became part of a special comic relased during the weekend when this header was up: [[Disappearing Sunday Update]].]
***[The [[Disappearing_Sunday_Update#Transcript|transcript of that comic]] describes the images in the open book.]
***[Four links in gray blue are given with the first word in black:] Preorder:[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
****The entire picture is a [https://blog.xkcd.com/2019/08/02/how-to-chapter-list-and-introduction/ link] to a [[Blag]] post: ''How To: Chapter list and introduction''.
*It stayed up like this while the special [[Disappearing Sunday Update]] came out on Sunday 2019-08-04, and was there still on Monday [ http://web.archive.org/web/20190805050812/https://www.xkcd.com/ 2019-08-05], at least during the time that the Sudan Update was still up.
**When the next comic came out late that Monday, it probably disappeared along with the Disappearing comic, but the first update with the next header is from Tuesday [http://web.archive.org/web/20190806052948/https://xkcd.com/ 2019-08-06], but the Monday comic [[2185: Cumulonimbus]] was still on the front page at that time,.

===2019-07-23 - Back to previous header===
*[http://web.archive.org/web/20190723205152/https://xkcd.com/ 2019-07-23].
**[[2179: NWS Warnings]] was up when the header changed.
*It returned to the previous header from before the ComicCon header, see [[#2019-07-10 - Adding links|2019-07-10]]
*It stayed up until [http://web.archive.org/web/20190802192259/https://xkcd.com/ 2019-08-02] while [[2184: Unpopular Opinions]] was up. The day after when it changed that comic was still up.

===2019-07-15 - ComiCon===
*[http://web.archive.org/web/20190715181016/http://xkcd.com/ 2019-07-15].
**[[2176: How Hacking Works]] was up when the header changed.
*Randall tells that he will be at ComicCon and links to his plans there.
**The text:
***Going to San Diego Comic Con this week? I'll [https://blog.xkcd.com/2019/07/15/san-diego-comic-con/ see you there]!
****The link is to a [[Blag]] post about his plans for the ComicCon
**Randall appeared in a couple of panels, and gave a talk.
**Finally he also handed out signed copies of his new [[How To]] book more than a month before official release.
***So still promoting the book, also in this header...
*It stayed up until [http://web.archive.org/web/20190722192637/https://www.xkcd.com/ 2019-07-22] the day after the ComiCon ended, while [[2178: Expiration Date High Score]] was up.
**Then it returned to the previous header from before the ComicCon announcement when [[2179: NWS Warnings]] came out.

===2019-07-10 - Adding links===
*[http://web.archive.org/web/20190710165920/https://xkcd.com/ 2019-07-10].
**[[2173: Trained a Neural Net]] was still up when the header changed slightly from that fro the day before.
**Only change was that beneath the picture, see [[#2019-07-09 - Drawings from How To|2019-07-09]], there is now a list of four links to companies where the book can be preordered.
**The extra text:
***[Four links in gray blue are given with the first word in black:] Preorder:[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
*Note that the day after this change, [https://web.archive.org/web/20190711172451/https://xkcd.com/ 2019-07-11], a link to [[How To]] was added to the [[Design_of_xkcd.com#xkcd_links|links]] in the top left corner of xkcd.
*The header stayed like this until [http://web.archive.org/web/20190714175710/https://xkcd.com/ 2019-07-14] when [[2175: Flag Interpretation]] was up. When it changed the day after [[2176: How Hacking Works]] was up.

===2019-07-09 - Drawings from How To===
*[http://web.archive.org/web/20190709162102/https://xkcd.com/ 2019-07-09].
**[[2173: Trained a Neural Net]] was up when the header changed.
**Randall continues to promote his new book, [[How To]].
***The image shows a small picture of his book with text on either side.
***Below are what appears to be three drawings from the book. [[Ponytail]] pole vaultig with three baloons in one hand, then text, then a truck with a house behind it speeding fast up a hill then text and finally [[Cueball]] somersaulting towards an explosion.
***To the right there is a big blue button to click for preorder, with text below.
**The text:
***New book [Arrow points to book. Title can be read: How To]
***How To: Absurd Scientific Answers to Common Real-world Problems
***It's a guide to bad ways to do things...
***...And what would happen if you tried them.
***''Boom''
***Click here to preorder
***Or click anywhere. I still haven't figured out HTML imagemaps.
****The entire picture is a [https://xkcd.com/how-to/ link] to the official [[How To]] page on xkcd: https://xkcd.com/how-to/
****See [[1572: xkcd Survey]] where Randall mentions that he cannot make imagemaps.
*It stayed up like this only for a day, then an extra line of links was added the day after while the same comic was still up, see [[#2019-07-10 - Adding links|2019-07-10]].
**But the general header stayed up first for five days, and then it returned again for 10 more days after a break to announce a [[#2019-07-15 - ComiCon|ComiCon visit]].
**So a total of 16 days with this drawing.

===2019-06-25 - People with books===
*[http://web.archive.org/web/20190625190843/https://xkcd.com/ 2019-06-25].
**[[2167: Motivated Reasoning Olympics]] was up when the header changed.
**Randall continues to promote his new book, [[How To]], and his book tour.
***The image now shows 15 people standing side by side each holding a book up in front of them with unreadable titles.
***From left: [[Megan]], [[Cueball]], a man with blonde hair, [[Jill]], [[Blondie]], [[Hairy]], another Hairy, [[White Hat]], a kid with curly hair, [[Hairbun]], another Cueball, another Megan, a guy with a knit cap, [[Ponytail]], and [[Beret Guy]].
***Above them is a text message.
**The text:
***Want to bring me to your town for my '''''How To''''' book tour? Click to find out how to enter the challenge!
****The entire picture is a [https://blog.xkcd.com/2019/06/10/book-tour-announcement/ link] to the official book tour announcement posted on the [[Blag]], with all cities and dates listed with details.
****In the link it is explained how to enter a competition on how to bring Randall to your city.
****Make a story using only book titles and get the books used to be held up by different individuals.
****A longer sentence will improve your chances.
*****This is indeed what this header picture shows.
*The header stayed like this until [http://web.archive.org/web/20190708155517/https://xkcd.com/ 2019-07-08] when [[2172: Lunar Cycles]] was up. When it changed the day after [[2173: Trained a Neural Net]] was up.

===2019-06-15 - Adding dates===
*[http://web.archive.org/web/20190615100645/http://xkcd.com/ 2019-06-15]
**[[2163: Chernobyl]] was up when the header changed.
**Randall only made a small change to the one that had been up for four days at this time.
**The text only changed by adding a line below the first line:
***Announcing the '''''How To''''' book tour:
***[Click here for dates and tickets]
****The rest of the header is exactly the same as on [[#2019-06-11 - Book tour|2019-06-11]], except everything is a bit smaller to make room in the same place for the extra line.
****The link is not located on the blue part of the text and it was already there before this update.
****Best guess is that not many clicked through and Randall then made it obvious that there was a link.
****The entire picture is a [https://blog.xkcd.com/2019/06/10/book-tour-announcement/ link] to the official book tour announcement posted on the [[Blag]], with all cities and dates listed with details.
****Randall has previously made it clear, in [[1572: xkcd Survey]], that he knows how to make an image a link, but not how to put the link only where he says to click. But it is easier to make a place for people to click than tell them this...
*The header stayed like this until 2019-06-25, when it changed while [[2167: Motivated Reasoning Olympics]] was up. But this one was still up when that comic came out the day before [http://web.archive.org/web/20190624162740/https://xkcd.com/ 2019-06-24].

===2019-06-11 - Book tour===
*[http://web.archive.org/web/20190611031920/https://xkcd.com/ 2019-06-11]
**[[2161: An Apple a Day]] was up when the header changed.
***'''Note''' when this change happened two new links was added to the [[Design_of_xkcd.com#xkcd_links|xkcd links]] section of xkcd.
**Randall changed the header text to announce the official book tour for his newest book ''[[How To]]'' to be released 3 months later.
**The text:
***Announcing the '''''How To''''' book tour:
***[Below this header is a map of the mainland USA with 14 labeled black dots indicates the 14 cities that the book tour will take Randall to. One red dot with five red question marks above is located beneath the map to the left, indicating a 15th city to be chosen in a contest. Above the map to the right is a small picture of the book with the blue title on the black cover. Above the book is the release date and with an arrow pointing down to the book.]
***September 3rd
***How to
***Seattle
***Portland
***San Francisco
***Santa Cruz
***Los Angeles
***Salt Lake City
***Kansas City
***Ann Arbor
***Cincinnati
***Louisville
***Cambridge
***New York
***D.C.
***Raleigh
***????? (Chosen by readers)
***[The entire picture is a [https://blog.xkcd.com/2019/06/10/book-tour-announcement/ link] to the official book tour announcement posted on the [[Blag]], with all cities and dates listed with details.]
****In the link it is explained how to enter a competition on how to bring Randall to your city.
****Make a story using only book titles and get the books used to be held up by different individuals.
****Only US cities can apply.
**The header only stayed exactly like this for three days, and was still up on [http://web.archive.org/web/20190614094729/https://xkcd.com/ 2019-06-14] when [[2162: Literary Opinions]] was on the front page.
***Then it changed slightly to indicate that the picture was a link which was not clear before. See above.

===2019-05-17 - Back to previous header===
*[http://web.archive.org/web/20190517103928/https://xkcd.com/ 2019-05-17]:
**[[2150: XKeyboarCD]] was still up when the header changed.
*It changed back to the exact same heading as before the one with Google reader here below.
**See [[#2019-02-06 - How to book|2019-02-06]] below for all details.
**It stayed up for more than three weeks and was still up on [http://web.archive.org/web/20190610055519/https://www.xkcd.com/ 2019-06-10], while [[2160: Ken Burns Theory]] was still up on the day the next comic [[2161: An Apple a Day]] was to be released (where the new header could be found at least the next day, but maybe from the release of that comic?). Then it changed to announce the book tour for his new book.

===2019-04-23 - Google Reader===
*[http://web.archive.org/web/20190423155458/https://xkcd.com/ 2019-04-23]:
**[[2140: Reinvent the Wheel]] came out when it changed, ending a more than two and half month long [[#2019-02-06 - How to book|promotion]] of Randall's new book [[How To]].
**Randall changed the header text to ask if the reader still mourned the loss of {{w|Google Reader}} which closed on 2013-07-01, almost 6 years before this comic..
***He offers the possibility to sign up to receive the newest comic by e-mail.
**The comic may have relation to this, as some where using Google reader for different purposes when they closed it, without any chance of [https://www.google.com/reader/about/ getting your data out].
***The comic "Reinvent the Wheel" mentions that using external dependencies carry risks, such as Google closing down a feature. given the fact that the comic came out as the header changed it is probably not a coincidence.
**The text:
***Still mourning the demise of Google Reader? You can sign up to get new comics delivered by email [https://xkcd.com/newsletter/ here].
**The link is to https://xkcd.com/newsletter, where it is possible to submit your e-mail address and press a subscribe button.
***the following text is written above it:
***To receive the comic and news postings in your inbox, subscribe here.
**It stayed up for more than three weeks and was still up on [http://web.archive.org/web/20190516100403/https://xkcd.com/ 2019-05-16], when [[2150: XKeyboarCD]] was up. Then it changed back to the promotion of his new book.

===2019-02-06 - How to book===
*[http://web.archive.org/web/20190206060904/https://xkcd.com/ 2019-02-06]:
**[[2107: Launch Risk]] was up at the time when it changed, having been up since Monday the 4th of February.
***Here it can be seen being on the front of xkcd on [http://web.archive.org/web/20190205050302/https://xkcd.com/ 2019-02-05], without the new text. This was also the last time the standard header text was used in several months.
***[[2108: Carbonated Beverage Language Map]] came up later on the day the header changed.
**Randall changed the header text to promote his newest book ''[[How To]]'' to be released 7 months later.
***He added an image of the book with large text next to it regarding the release and links on how to preorder it.
***There was no direct relation to the comics released at the time, except of course that he kind of launched his new book with all the risk it involves, while having a comic called launch risk up. It was though a very different and more real type of launch risk (of a human carrying space rocket) in the comic.
**The text:
***[The book is shown to the left as a black rectangle with large blue text and smaller gray text. On the book cover, in white drawings, are seen Megan with a ladder and either Black or White Hat (hard to say on black background). Both are looking up on Cueball who is floating in the air with a quadcopter beneath either leg, trying to plug in an electric light bulb in a naked lamp hanging down near him. It seems he has already removed the broken light bulb, as he has one in both hands. And now he tries to put in the new one. He could have let Megan use the ladder...]
***[The header in blue above it all:] How To.
***[Sub header in gray to the left of Cueball:] Absurd Scientific Answers to Common Real-world Problems
***[Author name in blue below the drawing:] Randall Munroe
***[Sub header to this below in gray:] Creator of xkcd
***[Sub header to this below in gray:] Author of what if? and Thing Explainer
***[Next to this book image are the following text:]
***[Large heading:] HOW TO
***[Normal size sub header:] Absurd Scientific Answers to Common Real-world Problems
***[In smaller gray font below:] Available September 3, 2019.
***[Four links in gray blue are given with the first word still in gray:] Preorder:[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
**It stayed up for more than two and a half month and was still up on [http://web.archive.org/web/20190422030324/https://xkcd.com/ 2019-04-22], when [[2139: Email Settings]] was up. Then it finally changed to a new header without going back to the standard.

===2018-11-07 - Back to standard text===
*[http://web.archive.org/web/20181107144453/https://www.xkcd.com/ 2018-11-07]
**The text returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**It stayed like this until [[2107: Launch Risk]] was up on [http://web.archive.org/web/20190205050302/https://xkcd.com/ 2019-02-05], so two days less than three months.
***After this it did not return to the standard text for almost three years, but just short of a month before the third year without it, it returned on [[#2022-01-08 - Back to standard text|2022-01-08]].

===2018-11-06 - Election Day===
*[http://web.archive.org/web/20181106122850/https://xkcd.com/ 2018-11-06]:
**[[2068: Election Night]] (on election day the day after this comic was released).
***It added a larger comic above the two links from the previous header. Those links of the previous header text was still up the day before [http://web.archive.org/web/20181105105855/https://xkcd.com/ 2018-11-05], when [[2067: Challengers]] was still up.
**Randall changed the xkcd header once more to try to make more people vote, and in this case help others to vote.
***Once again directly related to the new comic about election night.
**The text:
***[A line of altering blue and red stars, blue first and last of two rows of nine starts around of the heading:]
***Election Day!
***[Below Black Hat and Ponytail to the left and Megan to the right of Cueball is checking their smart phones. Cueball is addressing the reader:]
***Cueball: The biggest thing you can do th help is to check in with friends and family and make sure they know when and where they're voting.
***[Below these four characters there is the following text with two arrows pointing left and right. Both are turning up to text/links on either side of the four:]
***Use these links to answer questions
***[To the left:] Where and how to vote: [https://www.vote.org/ Vote-org]
***[To the right:] What's on your ballot: [https://www.ballotready.org/ BallotReady.org]
***[Below was the two links from the previous header:]
***Find out where to vote: [https://www.vote.org/ vote.org].
***See what's on your ballot: [https://www.ballotready.org/ BallotReady.org]
**It was only up one day and thus on ended the day after [http://web.archive.org/web/20181107144453/https://www.xkcd.com/ 2018-11-07] when the next comic [[2069: Wishlist]] came out.
***The text then returned to the standard xkcd header: xkcd updates every Monday, Wednesday, and Friday.
****It stayed like this until [[2107: Launch Risk]] was up on [http://web.archive.org/web/20190205050302/https://xkcd.com/ 2019-02-05].

===2018-11-02 - Where to vote===
*[http://web.archive.org/web/20181103021059/https://xkcd.com/ 2018-11-02]:
**[[2067: Challengers]] (on the Friday, it was released).
***It added another link to the previous header text. That text was still up the day before on Thursday [http://web.archive.org/web/20181102015102/https://xkcd.com/ 2018-11-01].
***That was while comic [[2066: Ballot Selfies]] was still up.
**Randall changed the xkcd header to let people know who is on their voting ballot, and as before there is also a link on how to register for voting.
***This is also directly related to the new comic that came out that day, about helping people to decide who to vote for, i.e. who is on their ballot.
**The text:
***Find out where to vote: [https://www.vote.org/ vote.org].
***See what's on your ballot: [https://www.ballotready.org/ BallotReady.org]
**This was done at this moment because the {{w|United States midterm election}} was held on {{w|United States elections, 2018|Tuesday, November 6, 2018}}, four days after the release of this comic.
**It was still up the day before the election day, [http://web.archive.org/web/20181105105855/https://xkcd.com/ 2018-11-05], and then it changed with the next comic.

===2018-10-22 - Register for voting===
*[http://web.archive.org/web/20181022120935/https://xkcd.com/ 2018-10-22]:
**[[2061: Tectonics Game]] (on a Monday, the 3rd day after release of this Friday comic)
***The standard text was still up Sunday [http://web.archive.org/web/20181021141446/https://xkcd.com/ 2018-10-21].
***The comic [[2062: Barnard's Star]] was released later that day.
**Randall changed the xkcd header to try to get people to register for voting.
**The text:
***Check your registration and find your polling place at [https://www.vote.org/ vote.org].
**This was done at this moment because the {{w|United States midterm election}} was held on {{w|United States elections, 2018|Tuesday, November 6, 2018}}, about two weeks after the release of this comic.
***It is generally believed that many of those not voting would have chosen democrats on election day, and thus Randall has an interest in getting as many as possible to register, see [[1756: I'm With Her]] (apart from the fact that he also most likely thinks that it is important to use the right to vote).
**It ended on [http://web.archive.org/web/20181103021059/https://xkcd.com/ 2018-11-02], when [[2067: Challengers]] came out.
***It was still there while [[2066: Ballot Selfies]] was still up the day before on [http://web.archive.org/web/20181102015102/https://xkcd.com/ 2018-11-01].

===2018-09-13 - NY votes today===
*[http://web.archive.org/web/20180913133544/https://xkcd.com/ 2018-09-13]
**[[2045: Social Media Announcement]] (the day after the release of the comic.)
***It was not up when the comic was released on [http://web.archive.org/web/20180912131437/https://xkcd.com/ 2018-09-12].
**It was a short lived reminder that NY votes today below the usual standard text.
**The text:
***xkcd updates every Monday, Wednesday, and Friday.
***NY votes today! Find your polling place [https://voterlookup.elections.ny.gov/ here]. (Zephyr Teachout for AG!)
**It ended with [[2046: Trum-]], the very next comic, on [http://web.archive.org/web/20180914175605/https://xkcd.com/ 2018-09-14], returning to the standard text.

===2017-11-26 - Christmas gifts===
*[http://web.archive.org/web/20171126130857/http://xkcd.com/ 2017-11-26]
**[[1920: Emoji Sports]] had been up two days [http://web.archive.org/web/20171125125648/https://xkcd.com/ 2017-11-25] before the message changed from the normal version. But it changed the day before the next comic came up.
***It was changed to a commercial for Christmas shopping with a code for getting 5$ of the price with a codes for different online shops.
**The text:
***To anyone looking for Christmas gifts: Until Monday you can get $5 off
***[https://www.amazon.com/What-International-Scientific-Hypothetical-Questions/dp/0544456866 What If?] and [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Thing Explainer] on Amazon with coupon code GIFTBOOK17.
***At Barnes & Noble, until Sunday you can get 20% off [https://www.barnesandnoble.com/w/what-if-serious-scientific-answers-to-absurd-hypothetical-questions-randall-munroe/1118864093 What If?] and [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432 Thing Explainer] using code GIVETHANKS.
**It was only up a few days and ended with [[1922: Interferometry]] on [http://web.archive.org/web/20171130150053/http://xkcd.com/ 2017-11-30] where it returned to the standard text.
***But it was still up when the comic in between [[1921: The Moon and the Great Wall]] was up on [http://web.archive.org/web/20171129140033/http://xkcd.com/ 2017-11-29].

===2017-09-22 - Visiting the UK===
*[http://web.archive.org/web/20170922232616/https://xkcd.com/ 2017-09-22]:
**[[1893: Thread]] (with its release).
***It was not up on the previous comic [[1892: USB Cables]], on the day they changed [http://web.archive.org/web/20170922025204/https://xkcd.com/ 2017-09-22].
**It was an announcement that Randall would visit the UK next week.
**The text:
***I'll be visiting the UK next week! You can join me in London from September 30-October 2 (at [https://live.newscientist.com/speakers/randall-munroe New Scientist Live], [http://www.rigb.org/whats-on/events-2017/october/public-lunchtime-talk--randall-munroe The Royal Institution], and [http://www.intelligencesquared.com/events/randall-munroe-on-making-complicated-stuff-simple/ Intelligence Squared]), then from October 3-6 in [https://www.stpetersyork.org.uk/public_lectures/randall_munroe_thing_explainer York], [https://www.eventbrite.co.uk/e/thing-explaining-with-randall-munroe-tickets-37832289396 Edinburgh], [https://www.toppingbooks.co.uk/events/ely/randall-murray-thing-explainer/ Cambridge and Ely], [https://www.eventbrite.co.uk/e/randall-munroe-book-signing-thing-explainer-tickets-38041072873 Oxford], and [http://www.cheltenhamfestivals.com/literature/whats-on/2017/randall-munroe/ Cheltenham].
**Ended with [[1900: Jet Lag]] on [http://web.archive.org/web/20171010045802/https://xkcd.com/ 2017-10-10] when the text returned to normal.
***But it was still up the day before with [[1899: Ears]] on [http://web.archive.org/web/20171009040109/https://xkcd.com/ 2017-10-09].

===2017-07-31 - Thank you===
*[http://web.archive.org/web/20170731021227/https://www.xkcd.com/ 2017-07-31]:
**[[1869: Positive and Negative Reviews]] (3rd day after release of this Friday comic)
***The comic [[1870: Emoji Movie Reviews]] was released later that day.
***Megan is holding hand with Cueball and next to them is two words above each other: Thank you.
***The image is also a link.
****The link goes to [http://web.archive.org/web/20170801042453/https://www.nytimes.com/interactive/2017/07/25/us/politics/senate-votes-repeal-obamacare.html How Each Senator Voted on Obamacare Repeal Proposals], an article showing the senate votes. (here in an archived version).
**Ended with [[1872: Backup Batteries]] on [http://web.archive.org/web/20170804152509/https://xkcd.com/ 2017-08-04], but was still up when [[1871: Bun Alert]] was up on [http://web.archive.org/web/20170803124342/https://xkcd.com/ 2017-08-03].

===2017-07-25 - Vote against health care bill===
*[http://web.archive.org/web/20170725103104/https://xkcd.com/ 2017-07-25]:
**[[1867: Physics Confession]] (2nd day after release of the comic, it was not up on the first day: [http://web.archive.org/web/20170724095252/https://xkcd.com/ 2017-07-24]).
**Randall modified the xkcd header to ask readers to support voting against Donald Trump's new health care bill.
***The header was replaced with an image which is available in an archived version [https://web.archive.org/web/20170726150959im_/https://imgs.xkcd.com/notes/call-senate.png here].
***The image is also a link (and you can click anywhere on it to go to the link that is mentioned).
****The link goes to [http://web.archive.org/web/20170729003307/https://www.trumpcareten.org/daily TrumpCare Ten] (here in an archived version).
****Randall has previously made it clear, in [[1572: xkcd Survey]], that he knows how to make an image a link, but not how to put the link only where he says to click.
***Transcript of the image:
****[Megan is holding hand with Cueball next to three lines of large text, the same height as they are:]
****Please tell your senators to vote against this health care bill. It will hurt people.
****[After these three lines there is a phone number in a very large bold font with a line of text below:]
****202-224-3121
****Or click here for more info
****[Below the above is a gray line which is split in the middle with gray text, and below that four state names in white text inside black boxes:]
****Know anyone in these states? Ask them to call, too.
****Alaska Maine Nevada Ohio West Virginia
**Ended while [[1869: Positive and Negative Reviews]] was up on [http://web.archive.org/web/20170731164828/https://xkcd.com/ 2017-07-31], when it was replaced by a ''Thank you''.
***That comic came out already [http://web.archive.org/web/20170728124230/https://xkcd.com/ three days before] (Friday comic), but was still up on [http://web.archive.org/web/20170730141019/https://www.xkcd.com/ 2017-07-30]) when the message changed sometimes between Sunday 30th and Monday 31st (where [[1870: Emoji Movie Reviews]] was released).

===2017-01-21 - Update on previous===
*[http://web.archive.org/web/20170122003124/https://xkcd.com/ 2017-01-21]:
**[[1788: Barge]]
**It came up almost a month after Christmas but did not really change the sales pitch of the previous. It just removed the link image with the large red text, see previous version below.
**The text:
***There are [https://store.xkcd.com/collections/featured four new shirts] in [https://store.xkcd.com/ the xkcd store],
***along with [https://store.xkcd.com/collections/posters posters] and [https://store.xkcd.com/collections/everything lots of other stuff]!
**Ended with [[1867: Physics Confession]] on [http://web.archive.org/web/20170725103104/https://xkcd.com/ 2017-07-25].
***That comic came up [http://web.archive.org/web/20170724095252/https://xkcd.com/ the day before] the above version of the header appeared.
***So the first day after release it was still the T-shirt commercial.
***And it did not return to the standard version in between.

===2016-11-28 - Christmas sale===
*[http://web.archive.org/web/20161128153015/http://xkcd.com 2016-11-28]
**[[1765: Baby Post]]
**This came up in time for the Christmas sale of 2016.
**The text was
***There are [https://store.xkcd.com/collections/featured four new shirts] in [https://store.xkcd.com/ the xkcd store],
***along with [https://store.xkcd.com/collections/posters posters] and [https://store.xkcd.com/collections/everything lots of other stuff]!
***Above the text there was an image with two black t-shirts with white print on the chest. They were located at either end of a large red text written in the text type used in the comic. This text said New xkcd shirts.
***The entire image was a link to the [https://store.xkcd.com/ xkcd store].
**Ended with [[1788: Barge]] [http://web.archive.org/web/20170121114423/https://xkcd.com/ 2017-01-21]

===2016-04-23 - Back to standard text===
*[https://web.archive.org/web/20160423103108/http://xkcd.com/ 2016-04-23]
**When [[1671: Arcane Bullshit]] came out (probably 2016-04-22, but no earlier archived versions exist) the text returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**It stayed like this for more than 7 months until [[1764: XKCDE]] was up on [https://web.archive.org/web/20161128093459/http://xkcd.com/ 2016-11-28].

===2016-04-04 - Protip on Garden===
*[https://web.archive.org/web/20160404185353/http://www.xkcd.com/#5dbfbb82-fc20-11e5-8001-42010a8e000d 2016-04-04]
**Because of the complexity of the [[:Category:April fools' comics|April fools' comic]] [[1663: Garden]], Randall needed to give people some advice, hence a [[:Category:Protip|protip]] was added.
***This came in several versions, not all managed to be documented in the archive. See more in the trivia for garden regarding the [[1663:_Garden#Header_text_after_release|Header text after release]].
**The header text became a protip with the following text (the first version not documented only had the first line):
***'''Protip''': If you don't like how your garden is growing, you can click to prune it.
***You can copy the URL to share your garden. From other browsers, it will be view-only.
**When the next comic, [[1664: Mycology]], was released two days later on [https://web.archive.org/web/20160406194653/http://xkcd.com/1664/ 2016-04-06], an extra line of text was added, due to the issues caused by Garden not being on the front page {{xkcd}} but only on the numbered page {{xkcd|1663}}.
***This change was first documented on the front page the day after on [https://web.archive.org/web/20160407010635/http://xkcd.com/ 2016-04-07]
***The change was of course also on and all the other comic and thus also on the Garden comic from [https://web.archive.org/web/20160406192530/http://xkcd.com/1663/ 2016-04-06].
**Text added below the other two lines:
***Note: If you're seeing today's comic in place of your garden, change the URL from xkcd.com/#<your code> to xkcd.com/1663/#<your code>.
****This extra line was only there until next time the comic change, so last day was [https://web.archive.org/web/20160408145017/http://xkcd.com/ 2016-04-08].
**On [https://web.archive.org/web/20160408195958/http://xkcd.com/ 2016-04-08] when [[1665: City Talk Pages]] was released the extra line was removed leaving the two written first here above.
***This was also the case on the Garden comic (and all other comics) from [https://web.archive.org/web/20160408204740/http://xkcd.com:80/1663/ 2016-04-08].
**The Protip stayed in the main header text until [https://web.archive.org/web/20160422102754/http://xkcd.com/ 2016-04-22] when [[1670: Laws of Physics]] was up.
***But even though it disappeared from main header and thus from all other comic it stayed on the Garden comic, also on [https://web.archive.org/web/20160423182630/http://xkcd.com:80/1663/ 2016-04-23].
***And it has then turned out to become one of the permanent [[xkcd_Header_text#Garden|Unique header texts]].

===2016-04-04 - Back to standard text as Garden came up===
*[https://web.archive.org/web/20160404123555/http://xkcd.com/ 2016-04-04]
**For a brief period of time, when [[1663: Garden]] was finally released, the Header text returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**But this lasted less than 13 hours. (Time between the previous and next archived version is 13 hours and 7 minutes).
***As people needed guidance to the new complicated comic.

===2016-04-01 - April 1st comic - technical difficulties===
*[https://web.archive.org/web/20160401204749/https://xkcd.com/ 2016-04-01]
**When Randall had problem releasing [[1663: Garden]] several [[1663:_Garden#April_Fools.27_header_text|April Fools' header text]] arrived in short succession while [[1662: Jack and Jill]] was still up.
**Each of these where simple text.
***The first from the link abve:
****The xkcd April 1st comic is currently experiencing technical difficulties.
****Please stand by!
***The next from [https://web.archive.org/web/20160402125723/http://xkcd.com:80/ 2016-04-02] at 12:57:
****The xkcd April 1st comic is currently experiencing technical difficulties.
****Status update: Please stand by.
****Status update: This is fine. Everything is fine.
****Status update: Everything is on fire.
****Status update: Searching for calendar systems in which Saturday is April 1st.
***The next from [https://web.archive.org/web/20160402175822/http://www.xkcd.com 2016-04-02] at 17:58:
****The Friday xkcd comic is currently experiencing technical difficulties
****[Editor's note: Everything is on fire] and has been delayed until Sunday night.
**It stayed like the third version until [https://web.archive.org/web/20160404054612/http://xkcd.com/ 2016-04-04] three days after the April Fools' comic was supposed to come out, so Jack and Jill was up until it changed.
*This was what was needed to stop more than 10 months of promotion of the [[Thing Explainer]] book, see below.

===2015-12-13 - Thing Explainer is available===
*[https://web.archive.org/web/20151213194534/http://xkcd.com/ 2015-12-13]
**[[1615: Red Car]] was still up when the header changed.
***The change was that the promotion for where Randall was last week where removed and left only the promotion the book [[Thing Explainer]]:
**The text:
***Thing Explainer is available at: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
**It was last up on [https://web.archive.org/web/20160401125621/http://xkcd.com/ 2016-04-01] while [[1662: Jack and Jill]] was on the front page.
***This was the last time that Thing Explainer was [[:Category:Book promotion|promoted]] in the header text.
****The first time was [[xkcd_Header_text#2015-05-14_-_New_book_Thing_Explainer|2015-05-14]], so it had been part of the header text for almost ten and a half month. That is a record!

===2015-12-05 - Thing Explainer is available and Next week===
*[https://web.archive.org/web/20151205070539/http://xkcd.com/ 2015-12-05]
**[[1612: Colds]] was up when the header changed.
***This was also at this time the [[2015-11-24 - Pages from my new book Thing Explainer|previous header texts image] was moved below the comic.
**Randall goes back to a simple promotion of the book [[Thing Explainer]] listing where to boy it.'
***But he adds a line about where he will be next week, first to a book shop on Illinois and then later in Toronto, where the host was {{w|Ryan North}} from [https://qwantz.com/ Dinosaur comics], one of the [[Design_of_xkcd.com#Comics_I_enjoy|comics Randall enjoys]].
**The text:
***Thing Explainer is available at: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
***I'll be in [https://web.archive.org/web/20151211002159/http://www.andersonsbookshop.com/event/naperville-reads-randall-munroe Naperville, IL] and [https://web.archive.org/web/20151205205714/http://www.eventbrite.ca/e/indigo-exclusive-randall-munroe-tickets-18694384407 Toronto, ON] (with [https://qwantz.com/ Ryan North]!) next week.
**It was last up on [https://web.archive.org/web/20151212133400/http://xkcd.com:80/ 2015-12-12] while [[1615: Red Car]] was on the front page.

===2015-11-24 - Pages from my new book Thing Explainer===
*[https://web.archive.org/web/20151203234149/http://xkcd.com/ 2015-12-03]
**[[1611: Baking Soda and Vinegar]] was still up when the header changed.
***This was a special one comic header text consisting of a large image with pages and excerpts from the book [[Thing Explainer]].
***The image was larger than most comics, and took away the focus of today's comic.
***So already two days after, when [[1612: Colds]] was released, the image was relegated to the being below the comic, but inside the [[Design_of_xkcd.com#Main_comic|main comic]] segment, thus not a part of the [[Design_of_xkcd.com#Bottom_segment|bottom segment]].
****But it was displayed in the header for all comics, here [https://web.archive.org/web/20151204030024/http://xkcd.com/1609/ an example] from the comic released two comics before 1611, [[1609: Food Combinations]].
****See more (and the image) [[Thing_Explainer#Promotion_at_the_xkcd_home_page|here]] on the page for Thing Explainer.
**Description of the image:
***At the top are shown four pages from the book. Two mainly blue, left and right, with white text and large images and between them two mainly white pages with blue text and smaller images. None of the text is readable, but the two blue pages pictures can be understood even in this size.
****The first page is number 2 about an animal cell: ''Tiny bags of water you’re made of''. It shows a detailed drawing of a human cell, with text at the top, and then several labels with text beneath that have arrows pointing to different parts of the cell.
****The second page is number 31 about the cockpit of an airplane: ''Stuff you touch to fly a sky boat''. It shows the inside of a cockpit with view out of the four windows, with lots of buttons in the ceiling, and blue screens and instruments at the bottom. Out the windows can be seen clouds and Cueball hanging from a balloon (a reference to [[1110: Click and Drag]]).
*****A zoom in on this page is shown beneath the four pages, see more below.
****The third page is page 27. What is on this page is a bit difficult to see, as there are no big drawings with clear meaning. It is the second page in a two page section on Data centers, with the second page focusing on the Computer: ''Computer building''. The pictures shows the data racks, to the right, and the individual computer components put into these, to the top left, with the wiring shown below to the left. Lots of text with arrows to different parts.
****The fourth page is page 23 about Trees: ''Tree''. It clearly shows the silhouette of a white tree on blue background. Several animal live on, in and beneath it. Cueball is standing on the ground. All the text are beneath labels that points to parts of the tree or the tree dwellers.
***In between the two time two pages there is a readable text, split over five lines, with two arrow at the top going from the corners of the text to the near corners of the white pages to either side. And below three arrows, with two pointing similarly as the two top arrows, but starting at the bottom of the text, and one arrow pointing straight down from the middle of the text to the large image below.
***Beneath all this is a large image which shows a zoom in on the left part of the cockpit from the second page above. The zoom is focused on the two front windows, but only the left is entirely in the picture, and the balloon hanging Cueball, cannot be seen in this part of the right window.
****At this zoom level, most of the text van be read (that is labels written on things or having arrows pointing to them). Clouds can bee seen out of both windows and in the background a rocket launch with smoke plume below the rocket is visible. The horizon line is well defines across both windows. Some of the instruments can be seen below the windows with text written on them. And some blue areas, mainly screens can be seen.
***Beneath this picture is a line with links to where the book can be ordered, like the one from the previous header text.
**The text:
***Pages from my new book, ''Thing Explainer'': Complicated stuff in simple words.
***[Labels in the cockpit]:
****Sky
****Ground (This should be below the sky. If it's above the sky, you're either having a big problem or doing something ''really'' fun.)
****Use this stuff to tell the sky boat to fly itself.
****Fly
****How fast it feels IAS 172
****Direction HDG 240
****Fall or rise
****How high 2500
****Fly
****Helpful screen
****Where the ground is
****You are: Flying
****Look here if there is a problem
***Below this image is a line of text with the first word in black and the other are four links to where to order the book:
****Order: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
***The image is a link to [https://www.amazon.com/gp/product/0544668251/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0544668251&linkCode=as2&tag=thekcs-20&linkId=S4XRZJJKSMHOWEQU Thing Explainer on Amazon].
**It was only part of the header for two days until [https://web.archive.org/web/20151204050419/http://xkcd.com/ 2015-12-04].
***It was then moved below the comics as mentioned above from [https://web.archive.org/web/20151205070539/http://xkcd.com/ 2015-12-05] when the next comic [[1612: Colds]] came out.

===2015-11-24 - Thing Explainer is out today===
*[https://web.archive.org/web/20151124201602/http://xkcd.com/ 2015-11-24]
**[[1607: Supreme Court]] was still up, but [[1608: Hoverboard]] most have come out close to the change.
***See both [https://web.archive.org/web/20151125001228/http://xkcd.com/ 2015-11-25 00:12] and [https://web.archive.org/web/20151125230753/http://xkcd.com/ 2015-11-25 23:07].
***Since this new "comic" was actually a {{w|browser game}} made to celebrate the release of Randall's new book, ''[[Thing Explainer]]'', which was released on the same day as this comic: Tuesday, November 24, 2015. The comic thus appeared on a Tuesday, replacing that week's normal Wednesday release to coincide with the release day.
***Hence it is a shame that there is no archived versions on the 24th showing Hoverboard on the front page. Even though the new version of the Header text is shown on the 24th, but on the previous comic.
**Cause all the header text is about is the release day of Thing Explainer!
***The top part is text with a line with large letters and a line below in brackets and using smaller letters. Below that there is a line dividing the text from the next part.
***Below follows the same header that was up as early as [[#2015-05-15 - Thing Explainer details|2015-05-15]] with the open book and three lines of text.
**The text:
***My new book, [http://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ Thing Explainer], is out today!
***(If you're in NYC, you can also [https://web.archive.org/web/20150925015809/http://stores.barnesandnoble.com:80/author/11170358 come see me]!)
***A picture of the open book is shown with diagrams of a human cell on the left page and suspension bridges on the right. All held in blue nuances. And arrow goes from the first word of the text to the right to the book on the left. The text is also blue except the title of the book which is in red:
****New book: Thing Explainer
****Up Goer Five-style diagrams of things (explained in the ten-hundred most common words)
***Below this image is a line of text with the first word in black and the other are four links to where to order the book:
****Order: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
***The image above the order line is a link to the [[Blag]] post [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ New book: Thing Explainer].
**Already the day after [https://web.archive.org/web/20151125001228/http://xkcd.com/ 2015-11-25], when [[1608: Hoverboard]] was up, an extra line (a link) was added below the above. A line was separating it from the links above:
***[http://blog.xkcd.com/2015/11/24/a-puzzle-for-the-uk/ A puzzle for UK readers]
****This was to a blag post with A puzzle for the UK because he could not go to UK in person. So this was a kind of bonus for those who could solve it. (We need an entry on that here on xkcd...)
**On [https://web.archive.org/web/20151127114432/http://xkcd.com/ 2015-11-27] is still looked like this but then when the next comic, [[1609: Food Combinations]], came out on [https://web.archive.org/web/20151128130851/http://xkcd.com/ 2015-11-28] the line about seeing him in New York was removed.
**The version with the puzzle, but without the New York line, was then up until [https://web.archive.org/web/20151201222148/http://xkcd.com/ 2015-12-01] when [[1610: Fire Ants]] was up.
**Then on [https://web.archive.org/web/20151202225254/http://www.xkcd.com/ 2015-12-02] the line with the puzzle at the bottom was changed to:
***I'm doing a [https://www.facebook.com/AndyWeirAuthor/ live Q&A;] at 2:30pm PT with The Martian author Andy Weir.
****The link is to {{w|Andy Weir}}'s Facebook page. And the Q&A can likely not be seen anymore.
****Randall has made no less than two comics about the movie {{w|The Martian (film)|The Martian}}, [[1536: The Martian]] and [[1585: Similarities]].
***It only lasted that day, and this became the last day with this header text, so it ended while [[1611: Baking Soda and Vinegar]] was up.

===2015-10-22 - World Polio Day===
*[https://web.archive.org/web/20151022200022/http://xkcd.com/ 2015-10-22]
**[[1593: Play-By-Play]] was up when the header changed.
***Randall mentions World Polio Day and the comic he drew for Bill Gates' blog, [[XKCD Marks the Spot]].
***Although he still keeps mentioning the release date for [[Thing Explainer]].
**The text:
***We've [https://slate.com/technology/2015/08/no-new-polio-in-africa-for-one-year-gates-epidemiologist-on-vaccines-and-surveillance.html almost eradicated polio]. For World Polio Day, I drew a comic
***about the eradication efforts. You can see it on [https://www.gatesnotes.com/Health/XKCD-Marks-the-Spot Bill Gates's blog].
***My [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ new book] of complex diagrams and simple words comes out Nov 24th.
****The last line is split from the Polio announcement with a line.
**Was there until [[1607: Supreme Court]] was up on [https://web.archive.org/web/20151124065108/http://xkcd.com:80/ 2015-11-24].
***That was the day that the book was released, and when the next comic [[1608: Hoverboard]] came out, it was a celebration of the book.

===2015-09-23 - Book trip and tool===
*[https://web.archive.org/web/20150923044724/http://xkcd.com/ 2015-09-23]:
**[[1580: Travel Ghost]] was up when the header changed.
***Announcing the book trip for the [[Thing Explainer]] book as well as linking to a Thing Explainer word checker tool! Two lines of text with links.
**The text:
***News: Announcing my Thing Explainer [https://blog.xkcd.com/2015/09/22/im-going-on-a-book-trip/ book trip]. Come say hi!
***Other news: Announcing the Thing Explainer [https://blog.xkcd.com/2015/09/22/a-thing-explainer-word-checker/ word checker] tool!
****Both links are to the [[Blag]], the first a schedule for his book trip, and the second telling about Randall's new [https://xkcd.com/simplewriter/ Simple Writer] that could help you ''Write Like Up Goer Five and Thing Explainer''.
**Was there until [[1593: Play-By-Play]] was up on [https://web.archive.org/web/20151021164208/http://xkcd.com/ 2015-10-21].

===2015-09-06 - New links===
*[https://web.archive.org/web/20150906181550/http://xkcd.com/ 2015-09-06]:
**[[1573: Cyberintelligence]] was still up when the header changed.
***The promotion of the book, [[Thing Explainer]], stayed the same with a picture above links to preorder it, but the links was reduced from four to two, the amazon link changed and a new company was added for the second link removing the other three.
***See [[#2015-05-15 - Thing Explainer details|2015-05-15]] below for all details on the image.
**The new link text:
***Preorder: [https://www.amazon.co.uk/Thing-Explainer-Randall-Munroe/dp/1473620910 Amazon.co.uk}, [https://www.waterstones.com/book/thing-explainer/9781473620919 Waterstones]
**Was there until [[1579: Tech Loops]] was up on [https://web.archive.org/web/20150919220105/http://xkcd.com/ 2015-09-22].

===2015-08-09 - Back to previous header===
*[https://web.archive.org/web/20150809230825/http://xkcd.com/ 2015-08-09]:
**[[1561: Water Phase Diagram]] was still up when the header changed.
***It changed back to the exact same heading as before the one with other news here below.
****See [[#2015-05-15 - Thing Explainer details|2015-05-15]] below for all details.
**Stayed like this until [[1573: Cyberintelligence]] was out on [https://web.archive.org/web/20150905154014/https://xkcd.com/ 2015-09-05], but the only change was that the links to preorder changed from four to only two.

===2015-06-06 - Other news===
*[https://web.archive.org/web/20150606084120/http://www.xkcd.com/ 2015-06-06]
**Changed while [[1534: Beer]] was still up.
***This was just adding some "Other news", but leaving the promotion of [[Thing Explainer]] unchanged as in the [[#2015-05-15 - Thing Explainer details|previous header]], but adding two news stories in text below the link to preorder.
**The new text:
***In other news, [https://www.youtube.com/watch?v=ygrdAvmr-MA Space Weird Thing] is delightful, and I feel surprisingly invested in [https://web.archive.org/web/20150720074919/https://twitter.com/xkcdbracket @xkcdbracket's] results.
****The link to Space Weird Thing is a YouTube video with a simple words version of {{w|David Bowie|David Bowie's}} [https://www.youtube.com/watch?v=iYYRH4apXDo Space Oddity] music video, using only the top then hundred words. The creators contributes the idea to the [[1133: Up Goer Five]] diagram which also inspired the book Thing Explainer, also promoted in this header text.
****The other link is referring to [[1529: Bracket]] released 12 days before this update, as a twitter user made a survey going through all the brackets all the way to a winner was found. Seems Randall became interested in who won. See more on the comics page.
**Was there until [[1561: Water Phase Diagram]] was up on [https://web.archive.org/web/20150807181044/http://xkcd.com/ 2015-08-07]. Then it returned back to the previous header with only the promotion of the book.

===2015-05-15 - Thing Explainer details===
*[http://web.archive.org/web/20150515060322/http://www.xkcd.com/ 2015-05-15]
**[[1525: Emojic 8 Ball]]
**This was a more detailed promotion for Randall's new book: [[Thing Explainer]] to be published in November 2015, more than half a year after the announcement, compared to the previous change which was just a line and a link.
**The text:
***A picture of the open book is shown with diagrams of a human cell on the left page and suspension bridges on the right. All held in blue nuances. And arrow goes from the first word of the text to the right to the book on the left. The text is also blue except the title of the book which is in red:
****New book: Thing Explainer
****Up Goer Five-style diagrams of things (explained in the then hundred most common words)
***Below this image is a line of text with the first word in black and the other are four links to where to preorder the book:
****Preorder: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
***The image above the preorder line is a link to the [[Blag]] post [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ New book: Thing Explainer].
**Changed while [[1534: Beer]] was up on [https://web.archive.org/web/20150605082643/http://xkcd.com/ 2015-06-05], but only to add other information. The main promotion of the book stayed the same.

===2015-05-14 - New book Thing Explainer===
*[https://web.archive.org/web/20150514053623/http://www.xkcd.com/ 2015-05-14]
**[[1524: Dimensions]] was up.
***A single line announced the new [[Thing Explainer]] book, with link to the [[Blag]] post from the day before.
**The text:
***New book: [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ Thing Explainer!]
*The [[:Category:Book promotion|promotion of the book]] stayed up with some changes for [[xkcd_Header_text#2015-12-13_-_Thing_Explainer_is_available|more than 10 month]] first stopping when Randall had [[xkcd_Header_text#2016-04-01_-_The_xkcd_April_1st_comic_is_currently_experiencing_technical_difficulties|problems with his April Fool's comic]] in 2016... It is a record length.
**The first came already the day after so this short announcement was only up on this day and ended with the next comic. See above.
**See more details on the promotion of the book on the Thing Explainer page [[Thing_Explainer#Promotion_at_the_xkcd_home_page|here]].

===2015-02-11 - Back to standard text===
*[https://web.archive.org/web/20150211154103/http://xkcd.com/ 2015-02-11]
**When [[1485: Friendship]] came out the text returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**It stayed like this until [[1523: Microdrones]] was up on [https://web.archive.org/web/20150512184622/http://xkcd.com/ 2015-05-12], so just a day more than three months.

===2015-02-04 - Valentine cards only===
*[https://web.archive.org/web/20150204051152/http://xkcd.com/ 2015-02-04]
**[[1482: NowPlaying]] came out as it changed.
***After the last day of ordering t-shirt had passed it changed back to the picture with the Valentine cards from the previous header, but without the t-shirt picture.
***See that [[#2015-01-29 - Valentine cards and shirt|header change]], but only the first picture described.
**Ended while [[1484: Apollo Speeches]] was up on [https://web.archive.org/web/20150210005540/http://xkcd.com/ 2015-02-10].

===2015-02-02 - Last day shirt===
*[https://web.archive.org/web/20150202092804/http://xkcd.com/ 2015-02-02]
**[[1481: API]] came out as it changed.
***Just letting people know it is the last chance to order the binary t-shirt.
***There was just a line of text:
**The text was:
***Today is the last day to order the limited-run [https://web.archive.org/web/20150202092804/http://teespring.com/xkcdbinaryheart binary heart shirt]!
***The last words is link to the shirt in the shop.
**Ended before the next comic was up, but still the day after, when it was too late to order: [https://web.archive.org/web/20150203022036/http://xkcd.com/ 2015-02-03].

===2015-01-29 - Valentine cards and shirt===
*[http://web.archive.org/web/20150129183442/http://xkcd.com/ 2015-01-29]
**[[1479: Troubleshooting]] was up when it changed.
***It was to tell about both the two previous updates in the same header- Both about the collaboration to make science themed Valentine's Day cards and his new Valentine t-shirt.
***There where two pictures, with a promotion of the two products and a link to them in the shop.
***On the left was text about the cards with a small drawing to the right of the text showing the four cards.
****An ant talking to an aphids; Earth rotating about the sun but locked so one side melts; an ant with a fungus growing from it's head with a heart, and a Velociraptor skeleton where the last bit of the tail is put on by a person. The text on the cards are unreadable, but they can be seen via the link.
***The text (in three lines) was:
****Webcomic science Valentine card collaboration
****The [https://web.archive.org/web/20150127161237/http://store.xkcd.com/products/webcomic-science-valentines link to the cards] from the picture.
***The picture on the left shows binary numbers 0 and 1 in white on a black background. The middle of the three lines of those have message in red text.
***The text:
****0 1 0 1 0 Binary heart 1 1 1
****1 1 1 Valentine shirt 0 1
****0 0 0 1 [limited run] 0 0 1
****The [http://web.archive.org/web/20150125080756/http://teespring.com/xkcdbinaryheart link to the shirt] from the picture.
**Ended while [[1480: Super Bowl]] was up on [https://web.archive.org/web/20150201015913/http://xkcd.com/ 2015-02-01].

===2015-01-27 - Valentine's Day cards===
*[http://web.archive.org/web/20150127161237/http://xkcd.com/ 2015-01-27]
**[[1478: P-Values]] was up when it changed.
***It was to tell that about a collaboration to make science themed Valentine's Day cards.
***There was just two lines of text:
**The text was:
***I've teamed up with three other webcomic artists
***to make [https://web.archive.org/web/20150127161237/http://store.xkcd.com/products/webcomic-science-valentines a set of science-themed Valentine's Day cards]!
**There was a link to the cards on the store.
**Ended while [[1479: Troubleshooting]] was up [https://web.archive.org/web/20150128172147/http://xkcd.com/ 2015-01-28].

===2015-01-24 - Get shirts in store===
*[http://web.archive.org/web/20150124110707/http://xkcd.com/ 2015-01-24]
**[[1477: Star Wars]] came out as it changed.
***It was to tell about a new type of t-shirt for Valentine Day.
***There was just two lines of text:
**The text was:
***For Valentine's Day, you can get a binary heart shirt
***(from {{xkcd|99|comic #99!}}) in [http://web.archive.org/web/20150125080756/http://teespring.com/xkcdbinaryheart a limited run on TeeSpring]
**There was a link to [[99: Binary Heart]] and to the relevant t-shirt on the [https://teespring.com/ Teespring] home page.
**Ended while [[1478: P-Values]] was up [http://web.archive.org/web/20150126133139/http://xkcd.com/ 2015-01-26].

===2014-12-22 - Get shirts in store===
*[http://web.archive.org/web/20141222233233/http://xkcd.com/ 2014-12-22]
**[[1463: Altitude]] came out as it changed.
***After the Christmas sale deadline there was still merchandise in the [https://store.xkcd.com/ xkcd store].
***There was just a line of text:
**The text was:
***You can get xkcd shirts, prints, and posters in the [http://shop.xkcd.com/ store]!
**The word store was a link to the shop.
**Ended while [[1476: Ceres]] was up [http://web.archive.org/web/20150123102318/http://xkcd.com/ 2015-01-23].

===2014-12-19 - Back to previous header===
*[http://web.archive.org/web/20141219092349/http://www.xkcd.com/ 2014-12-19]:
**[[1462: Blind Trials]] came out as it changed.
*It changed back to the exact same heading as before the one with order now here below.
**See [[#2014-12-17 - Christmas deadline|2014-12-17]] below for all details.
**Ended while [[1462: Blind Trials]] was still up [http://web.archive.org/web/20141221172450/http://www.xkcd.com/ 2014-12-21].

===2014-12-18 - Order now===
*[http://web.archive.org/web/20141218090650/http://www.xkcd.com/ 2014-12-18]
**[[1461: Payloads]] was still up when it changed.
***It was to alert that the deadline for shipping before Christmas from the [https://store.xkcd.com/ xkcd store] was Friday and that it was rapidly approaching. This was a follow up on the [[#2014-12-17 - Christmas deadline|Wednesdays announcement]] the day before.
***The image was just four lines of text with several red and blue words.
**The text was:
***The xkcd store Christmas shipping deadline is Friday!
***Once it passes, there is no going back. The arrow of time drags us all
***Inexorably forward toward decay and disorder. toward the end of all things.
***Towards the empty silence of the grave. Order now!
**The entire drawing was a link to the [https://store.xkcd.com/ xkcd store], not just the blue text.
**Ended a day later while [[1461: Payloads]] was still up [http://web.archive.org/web/20141216084107/http://xkcd.com/ 2014-12-16].

===2014-12-17 - Christmas deadline===
*[http://web.archive.org/web/20141217085320/http://www.xkcd.com/ 2014-12-17]
**[[1461: Payloads]] came out as it changed.
***It was to alert that the deadline for shipping before Christmas from the [https://store.xkcd.com/ xkcd store] was Friday. This was announced Wednesday two days before the deadline.
***The image was just text with the last word in each line in red and the xkcd store blue as a link.
**The text was:
***Looking for a gift?
***xkcd store Christmas shipping deadline is Friday!
**The entire drawing was a link to the [https://store.xkcd.com/ xkcd store], not just the blue text
**Ended a day later while [[1461: Payloads]] was still up!

===2014-12-03 - Christmas shopping===
*[http://web.archive.org/web/20141203132024/http://www.xkcd.com/ 2014-12-03]
**[[1455: Trolley Problem]] came out as it changed.
***It was to announce the start of the Christmas shopping on the [https://store.xkcd.com/ xkcd store]
***Four boxes with shipping details are shown. Two green and two red, alternating from green. Between them are three text messages in two, two and three lines.
**The text was:
***xkcd store
***Christmas shopping
***I will probably not ship you a bobcat.
**The entire drawing was a link to the [https://store.xkcd.com/ xkcd store].
**The bobcat is a reference to [[325: A-Minus-Minus]].
**Ended while [[1460: SMFW]] was up [http://web.archive.org/web/20141216084107/http://xkcd.com/ 2014-12-16].

===2014-11-29 - Thanks - Emily===
*[http://web.archive.org/web/20141129211604/http://xkcd.com/ 2014-11-29]
**[[1453: fMRI]] was still up when it changed.
***It was to thanks for all the help his friend Emily with cancer got through among other his previous header text [[#2014-11-27 - Help Emily| Help Emily]].
***That only needed to be up two days before the goal was met.
**The text was:
***Thank you for helping my friend Emily.
***It means so much.
**Ended three days later while [[1454: Done]] was up [http://web.archive.org/web/20141202065133/http://xkcd.com/ 2014-12-02].

===2014-11-27 - Help Emily===
*[http://web.archive.org/web/20141127005239/http://xkcd.com/ 2014-11-27]
**[[1452: Jurassic World]] came out as it changed.
***It was to help a friend who got cancer by raising money for her.
**The text was:
***Hey all. My friend Emily—the economist who helped
***me with my {{xkcd|980|money chart}}—has been fighting cancer. She's
***having a rough time and could use some [http://web.archive.org/web/20141128183414/http://www.gofundme.com/e07dqk help]. Thank you.
**There are two links, one to the [[980: Money]] comic she helped Randall create, and one for her Go Fund Me page to raise money for her cancer cure.
***The help link above is to the archived version from that time, but the link was still active in August 2019: [https://www.gofundme.com/e07dqk Helping Emily Fight Cancer].
**Ended while [[1453: fMRI]] was up [http://web.archive.org/web/20141128070838/http://www.xkcd.com/ 2014-11-28].
***She did thus not get a permanent header as did Becky on the [[#Seven_Years|Seven Years]] comic.

===2014-10-02 - what if? bestseller===
*[http://web.archive.org/web/20141002211139/http://xkcd.com/ 2014-10-02]
**[[1428: Move Fast and Break Things]] was up when it changed from the [[#2014-09-02 - what if? book out|book is out]].
**This was a month after the ''[[What If? (book)|What If?]]'' book came out.
***It added a line of red text beneath the previous header to announce that the book was the #1 New York bestseller.
**The text was:
***My book is out!
***(#1 New York bestseller!)
**The entire image was a link to the [https://whatif.xkcd.com/book/ The Book] page on the [https://whatif.xkcd.com/ what if?] page on xkcd. post.
**Ended while [[1451: Background Screens]] was up [http://web.archive.org/web/20141125234520/http://xkcd.com/ 2014-11-25].

===2014-09-04 - what if? book out===
*[http://web.archive.org/web/20140904150600/http://xkcd.com/ 2014-09-04]
**[[1416: Pixels]] was up when it changed from the [[#2014-09-02 - what if? book out today|book is out today]].
**This was two days after the ''[[What If? (book)|What If?]]'' book came out.
***It only removed to today from the previous header, that had only been up two days.
**The text was:
***My book is out!
**The entire image was a link to the [https://whatif.xkcd.com/book/ The Book] page on the [https://whatif.xkcd.com/ what if?] page on xkcd. post.
**Ended while [[1428: Move Fast and Break Things]] was up [http://web.archive.org/web/20141001130827/http://xkcd.com/ 2014-09-01].

===2014-09-02 - what if? book out today===
*[http://web.archive.org/web/20140902125802/http://xkcd.com/ 2014-09-02]
**[[1415: Ballooning]] was up when it changed from the [[#2014-07-23 - what if? book tour|book tour header]].
**This was the day the ''[[What If? (book)|What If?]]'' book came out. [[Cueball]] standing to the left of the text with arms raised shouts this out.. The word Book is underlined and blue to indicate a link.
**The text was:
***My book is out today!
**The entire image was a link to the [https://whatif.xkcd.com/book/ The Book] page on the [https://whatif.xkcd.com/ what if?] page on xkcd. post.
**Ended while [[1416: Pixels]] was still [http://web.archive.org/web/20140903134518/http://xkcd.com/ 2014-09-03].

===2014-07-23 - what if? book tour===
*[http://web.archive.org/web/20140723180600/http://xkcd.com/ 2014-07-23]
**[[1398: Snake Facts]]
**This was a promotion of his book tour for the ''[[What If? (book)|What If?]]'' book made by [[Cueball]] standing to the left of the text with arms raised. Several parts of the text was underlined and blue to indicate links.
**The text was:
***I'm going on a book tour! click here for a list of stops.
***Or click anywhere-this whole image is one link because I've never gotten the hang of HTML imagemaps.
**The entire image was a link to the [[Blag]] post: [https://blog.xkcd.com/2014/07/22/what-if-book-tour/ What If book tour!].
***Later Randall commented on this lacking ability in the comic: [[1572: xkcd Survey]].
***He also mentions it in one of the [[#xkcd_Header_text#2019-07-09_-_Drawings_from_How_To|promotions]] for his [[How To]] book.
***He much later he again mentions that html is hard, thus explaining why the entire image is a link instead of the actual blue highlighted link in one of the promotions for [[xkcd_Header_text#2022-08-11_-_Preorder_What_if.3F_2_-_with_image|what if? 2]].
**Ended while [[1415: Ballooning]] was still up [http://web.archive.org/web/20140901113916/http://xkcd.com/ 2014-09-01].

===2014-03-13 - what if? announced===
*[http://web.archive.org/web/20140313070951/http://xkcd.com/ 2014-03-13]
**[[1341: Types of Editors]] was up.
**This was the first promotion of Randall's new ''[[What If? (book)|What If?]]'' book which is shown next to two lines of text.
**The text was:
***News:
***I'm publishing a ''what if'' book!
**The entire image was a link to the [[Blag]] post: [https://blog.xkcd.com/2014/03/12/what-if-i-wrote-a-book/ What if I wrote a book?]
**Ended while [[1397: Luke]] was up [http://web.archive.org/web/20140722142115/http://xkcd.com/ 2014-07-22].

===2014-01-09 - Back to standard text===
*[https://web.archive.org/web/20140109190927/http://www.xkcd.com/ 2014-01-09]
**When [[1314: Photos]] was still up when the text returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**It stayed until [https://web.archive.org/web/20140312070248/http://xkcd.com/ 2014-03-12] when [[1340: Unique Date]] was up, a bit more than two months.

===2013-12-21 - Deadline for Christmas shipping has passed===
*[https://web.archive.org/web/20131221043417/http://www.xkcd.com/ 2013-12-21]
**It changed when [[1306: Sigil Cycle]] came out.
**This came up when it was too close to Christmas in 2013 for shipping to arrive in time for Christmas. And Randall makes a note of this, but lets people know that they could still buy presents...
**The text was
***The deadline for guaranteed Christmas shipping has passed, but if you order something from the [http://store.xkcd.com/ xkcd store], we'll get it to you as fast as possible!
**Ended when [[1314: Photos]] was up on [https://web.archive.org/web/20140108181520/http://www.xkcd.com/ 2014-01-08].

===2013-12-06 - Empty header===
*[https://web.archive.org/web/20131206213503/http://xkcd.com/ 2013-12-06]
**It changed when [[1300: Galilean Moons]] came out.
***There just where no header text. This has not happened since. It looks really weird.
**Ended when [[1305: Undocumented Feature]] was up on [https://web.archive.org/web/20131220005306/http://xkcd.com/ 2013-12-20].

===Changes not documented yet 3===
*More changes will for sure be here between this and the one below.

====Interesting links in the Archive 3====
*Just put the link here with a date and maybe a short note:
*[https://web.archive.org/web/20131205202730/http://xkcd.com/ 2013-12-05]: Xmas sale before above
*[https://web.archive.org/web/20130315162227/http://xkcd.com:80/ 2013-03-15]: Empty follows below

===2013-03-15 - Empty header===
*[https://web.archive.org/web/20130315162227/http://xkcd.com:80/ 2013-03-15]
**It changed while [[1186: Bumblebees]] was on the front page.
***After the text saying a comic would be delayed disappeared no text replaced this.
***So the header was left empty!
**This lasted until [https://web.archive.org/web/20130318072820/http://xkcd.com/ 2013-03-18] while [[1187: Aspect Ratio]] was up.

===2013-03-13 - Comic will be delayed===
*[https://web.archive.org/web/20130313133631/http://xkcd.com/ 2013-03-13]
**It changed when [[1184: Circumference Formula]] came out, likely because the next comic was delayed.
***But there is a gap of three days before where no archived version exist, so cannot say if there where more than a few hours with this text.
**The text:
***The comic will be delayed until late morning EDT.
**Ended when [[1185: Ineffective Sorts]] was up on [https://web.archive.org/web/20130313175306/http://xkcd.com:80/ 2013-03-13].
***That was later same day as the first archived version. But could have been longer as mentioned above.

===2012-11-26 - xkcd store===
*[https://web.archive.org/web/20121126235628/http://xkcd.com/1138/ 2012-11-26]
**It changed while [[1138: Heatmap]] was up.
***Notice that the above link is not from the main page, but from {{xkcd|1138}}.
***There was a gap of five days in the archive of the main page.
***The first day that it was archived from the front page was on [https://web.archive.org/web/20121201111432/http://xkcd.com/ 2012-12-01], while [[1141: Two Years]] was up.
**The standard header text is replaced with an image that makes it seem like a rip is being torn in the white region where the text used to be. Beneath the white material that has now been ripped, some text can partly be seen. It is possible to read it.
**The text:
***xkcd store
****The image is a link to the [http://store.xkcd.com/ xkcd store] (tadaaa!)
**Ended when [[1183: Rose Petals]] was up on [https://web.archive.org/web/20130311073948/http://xkcd.com:80/1183/ 2013-03-11]
***The above link is from {{xkcd|1183}}.
***Last time the front page was archived with it was though on [https://web.archive.org/web/20130309010403/http://xkcd.com/ 2013-03-09].

===2012-10-24 - Back to standard text===
*[https://web.archive.org/web/20121024082017/http://xkcd.com:80/ 2012-10-24]
**While [[1124: Law of Drama]] was on the front the header returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**It stayed until [https://web.archive.org/web/20121126035129/http://xkcd.com:80/ 2012-11-26] when [[1138: Heatmap]] was up, a few days more than a month.

===2012-10-17 - New What-If - Lightning===
*[https://web.archive.org/web/20121017232102/http://xkcd.com/1121/ 2012-10-17]
**Probably while [[1122: Electoral Precedent]] was up.
***But the link above showing it was up on the 2012-10-17 is from the previous comics page {{xkcd|1121}} [[1121: Identity]].
***But the first version archived with this header is saved on [https://web.archive.org/web/20121018082304/http://xkcd.com/ 2012-10-18]
**Randall promotes another New What-If article.
***See the ''[[what if? (blog)|what if?]]'' article ''{{what if|16|Today's topic: Lightning}}''.
**The text
***New What-If article:
***[http://what-if.xkcd.com/16/ What if lightning struck while you were ...]
**This lasted until [https://web.archive.org/web/20121023023404/http://xkcd.com/1121/ 2012-10-23] when [[1124: Law of Drama]] was on the front page
***This link is though from {{xkcd|1121}}.
***The last this version was archived on the front page was the day before on [https://web.archive.org/web/20121022120008/http://xkcd.com:80/ 2012-10-22].

===2012-10-10 - New What-If - Mariana Trench Explosion===
*[https://web.archive.org/web/20121010003837/http://xkcd.com/ 2012-10-10]
**[[1118: Microsoft]] was still up at this time.
**Randall promotes another New What-If article.
***See the ''[[what if? (blog)|what if?]]'' article ''{{what if|15|Mariana Trench Explosion}}''.
**The text
***New What-If article:
***[http://what-if.xkcd.com/15/ What if you set off a nuclear bomb in the Mariana Trench?].
**This lasted until [https://web.archive.org/web/20121016055538/http://xkcd.com:80/ 2012-10-16] when [[1121: Identity]] was up.

===2012-10-02 - This week's What-If - Short Answer Section===
*[https://web.archive.org/web/20121002231724/http://www.xkcd.com/ 2012-10-02]
**[[1115: Sky]] was still up at this time.
**Randall promotes another New What-If article.
***See the ''[[what if? (blog)|what if?]]'' article ''{{what if|14|Short Answer Section}}''.
**The text
***In this week's What-If article I [https://what-if.xkcd.com/14/ answer multiple reader questions].
**This lasted until [https://web.archive.org/web/20121008112434/http://xkcd.com/ 2012-10-08] when [[1118: Microsoft]] was up.

===2012-09-26 - New What-If - Laser Pointer===
*[https://web.archive.org/web/20120926163111/http://xkcd.com/1108/ 2012-09-26]
**[[1113: Killed in Action]] was up at this time.
***The link above showing it happened on the 26th is from {{xkcd|1108}}
***The first day this version was archived on the front page was on [https://web.archive.org/web/20120928003838/http://xkcd.com:80/ 2012-09-28]
**Randall promotes another New What-If article.
***See the ''[[what if? (blog)|what if?]]'' article ''{{what if|13|Laser Pointer}}''.
**The text
***New What-If article:
***[http://what-if.xkcd.com/13/ If everyone aimed a laser pointer at the Moon at once, would it change color?]
**This lasted until [https://web.archive.org/web/20121001080517/http://xkcd.com/ 2012-10-01] when [[1115: Sky]] was up.

===2012-09-18 - what-if.xkcd.com - Raindrop===
*[https://web.archive.org/web/20120918143653/http://www.xkcd.com/1108/ 2012-09-18]
**[[1109: Refrigerator]] was still up at this time.
***The link above showing it happened on the 18th is from {{xkcd|1108}}
***The first day this version was archived on the front page was on [https://web.archive.org/web/20120919015232/http://xkcd.com/ 2012-09-19]
**Randall promotes another What-If article on the what-if page.
***See the the ''[[what if? (blog)|what if?]]'' article ''{{what if|12|Raindrop}}''.
**The text
***what-if.xkcd.com: [https://what-if.xkcd.com/12/ What if all of a storm's water fell in a single raindrop?].
**This lasted until [https://web.archive.org/web/20120925090123/http://xkcd.com:80/ 2012-09-25] when [[1112: Think Logically]] was up.

===Changes not documented yet 2===
*The above is the last documented.
**There will for sure be more changes earlier than this.

====Interesting links in the Archive 2====
*Just put the link here with a date and maybe a short note:
*[https://web.archive.org/web/20120917052827/http://xkcd.com:80/ 2012-09-17]: What if Droppings ends.
*[https://web.archive.org/web/20120718231719/http://www.xkcd.com/ 2012-07-18] Next stores header text

===2012-07-10 - New: what-if.xkcd.com===
*[https://web.archive.org/web/20120710114846/http://xkcd.com/1078/ 2012-07-10]
**This was a special change happening over a few days. The above "new" header text from the given date is actually shown on the previous comic [[1078: Knights]].
***Another example from [https://web.archive.org/web/20120710072249/http://xkcd.com:80/1070 2012-07-10] is shown for [[1070: Words for Small Sets]].
**The comic on the main page released on [https://web.archive.org/web/20120709045709/http://xkcd.com:80/ 2012-07-09] was [[1079: United Shapes]], but that comic had a [[xkcd_Header_text#United_Shapes|unique header text]] upon its release.
***So both on the 9th as shown above and on [https://web.archive.org/web/20120710114846/http://xkcd.com/1078/ 2012-07-10] the header text was different on the front than on all other pages.
****As can be read in the link above, the new header text actually got incorporated into the unique text, so that after the next comic was released on [https://web.archive.org/web/20120711234408/http://xkcd.com/1079/ 2012-07-11] the current new header text and a smaller version of the original unique header text was now shown on the Unites Shapes page.
****{{xkcd|1079|And it was never changed back}}.
**The first version of the new text from the 10th was only active one day:
***The text:
****New site: what-if.xkcd.com, where I abuse science to answer hypothetical questions. I'll answer a new question every Tuesday.
*****The link was not an active link. And this was never shown on the front page, but on all other comics.
**Already on [https://web.archive.org/web/20120711223349/http://xkcd.com/1078/ 2012-07-11] when [[1080: Visual Field]] was released the new header changed a bit
***At this time it most have been shown on the front page, but the link above is again from [[1078: Knights]].
****For some reason the front page was not saved on either the 11th or 12th, so no version of the front page with Visual Field exist
****The first archived version of the front page with this new header text was from [https://web.archive.org/web/20120713154207/http://xkcd.com/ 2012-07-13] when [[1081: Argument Victory]] was on the front page.
**The final text:
***New: [http://what-if.xkcd.com/1/ what-if.xkcd.com]: abusing science to answer hypothetical questions.
***I'll answer a new reader question every Tuesday.
****This time the link was active and directs to the new ''[[what if? (blog)|what if?]]'' blog and its first entry {{what if|1|Relativistic Baseball}}
**The whole idea was that Randall released the new what if? blog on the 10th of July 2012. And thus would like to make a promotion of it.
***And then he timed it so poorly that the front page had a different header than the rest of the comics.
***It was so annoying for him that he actually changed the header for Unites Shapes manually so that page also showed the new link. Maybe even before it left the front page, but that has not been documented in the archive.
***And then he forgot about it when the header changed for all the other comics, so it is now a relic of the promotion of his first what if release.
**The what if promotion continued for a long time, but the final version from above only lasted until 17th at the latest. There is again no archived versions of the front page from the 15th, 16th or 17th.
***The last time it was archived on the front page was [https://web.archive.org/web/20120714062857/http://xkcd.com/ 2012-07-14], when [[1081: Argument Victory]] was still up.
***But on [https://web.archive.org/web/20120715070938/http://xkcd.com:80/1081/ 2012-07-15] it was still shown on the page for Argument Victory and same for [https://web.archive.org/web/20120716235458/https://www.xkcd.com/998/ 2012-07-16] on [[998: 2012]]
****So seemed it stayed up while [[1082: Geology]] was up on the 16-17/7.

===2012-04-09 - Standard text plus store link===
*[https://web.archive.org/web/20120409190952/http://xkcd.com/1026/ 2012-04-09]
**It changed when [[1040: Lakes and Oceans]] came up.
***The above link to prove this is though from comic {{xkcd|1026}} [[1026: Compare and Contrast]] the first to be found that where archived on the 9th.
***The first archived version on the main page is from [https://web.archive.org/web/20120411053543/https://xkcd.com/ 2012-04-11] when [[1041: Whites of Their Eyes]] was up.
***There where no archived version of the front page on the 9th or 10th while Lake and Oceans was up. So it was also first on the 11th that this new text could be seen, but only when it had moved to its own page number [https://web.archive.org/web/20120411052948/http://xkcd.com/1040/ 1040].
****The change probably came because of this special comic, which may became a [https://store.xkcd.com/collections/posters/products/lakes-oceans-poster poster].
**The update was to add a promotion for the store under the standard header text.
**The text
***XKCD updates every Monday, Wednesday, and Friday.
***You can get prints, posters, and t-shirts in the [http://store.xkcd.com/ store].
**This lasted until [https://web.archive.org/web/20120709004956/http://www.xkcd.com/ 2012-07-09] when [[1078: Knights]] was up, exactly three months, so although not only the standard text, the standard text was first for three months and three days, see [[#2012-04-05 - Back to standard text|below]].

===2012-04-05 - Back to standard text===
*[https://web.archive.org/web/20120405195956/http://www.xkcd.com/1021/ 2012-04-05]
**While [[1038: Fountain]] was on the front the header returned to the standard xkcd header:
***xkcd updates every Monday, Wednesday, and Friday.
**The link above to prove the date is seen on [[1021: Business Plan]].
***The first archived version on front page is from [https://web.archive.org/web/20120406111048/http://xkcd.com/ 2012-04-06], when [[1039: RuBisCO]] was up.
***A version showing Fountain with this can be found on it's own page {{xkcd|1038}} on [https://web.archive.org/web/20120406085618/http://xkcd.com:80/1038/ 2012-04-06].
****When it was archived while on the front page it still had the previous header on [https://web.archive.org/web/20120404210927/http://xkcd.com:80/ 2012-04-05].
**It stayed up, unchanged, until [https://web.archive.org/web/20120408200414/http://xkcd.com:80/ 2012-04-08] when [[1039: RuBisCO]] was up. So only three days.
***But [[#2012-04-09- Standard text plus store link|the change]] did not remove the standard text but just added a link to the store. And this version, still with the standard text at the top stayed for three more months.

===2012-03-28 - Visiting Newport News===
*[https://web.archive.org/web/20120328103319/http://xkcd.com/ 2012-03-28]
**[[1035: Cadbury Eggs]] was on the front when it changed.
***From the end of March 2012, there is a problem with the archived versions of xkcd, so they do not load properly and do not include the comic picture.
**It was to announce a talk Randall gave at his old school.
**The text:
***I'm [https://blog.xkcd.com/2012/03/22/im-visiting-cnu-on-april-4th/ visiting] Newport News, VA next week, where I'll be speaking at CNU, my old school. If you want to come, reserve a seat [https://web.archive.org/web/20120329214411/http://www.cnu.edu/pcs/xkcd/index.asp here]!
****The first link it to a post in the [[Blag]]: [https://blog.xkcd.com/2012/03/22/im-visiting-cnu-on-april-4th/ I’m visiting CNU on April 4th].
****The other link is no longer working, but the link above goes to an archived version.
**There was a special situation with this header text. For three days it was not on the front page, as the [[:Category:April fools' comics|April fools' comic]] [[1037: Umwelt]] came out and stayed from April 1st to April 3rd on the front page.
***This comic had it's own [[#Unique header text|unique header text]] from the start, one that has [[#Umwelt|stayed like this]] since!
****So from [https://web.archive.org/web/20120401151639/http://xkcd.com:80/ 2012-04-01] to [https://web.archive.org/web/20120403223453/http://www.xkcd.com/ 2012-04-03] the front page had another header:
*****You can get posters, prints, and t-shirts in the [https://store.xkcd.com/ xkcd store].
***But all the other comics kept the Visiting header on all three days as shown here:
****[https://web.archive.org/web/20120401214214/http://xkcd.com:80/1036/ 2012-04-01] from[[1036: Reviews]].
****[https://web.archive.org/web/20120402150258/http://xkcd.com/1019 2012-04-02] from [[1019: First Post]].
****[https://web.archive.org/web/20120403164523/http://xkcd.com:80/1036/ 2012-04-03] from [[1036: Reviews]].
*****The one from the 2nd of April was hardest to find, but the most important, because that was clearly in the time period where Umwelt was up, thus definitely proving that the other pages had a different header than the front page. This is rare.
**It returned to the front page on [https://web.archive.org/web/20120404210927/http://xkcd.com:80/ 2012-04-04] and stayed up until [https://web.archive.org/web/20120405195956/http://www.xkcd.com/1021/ 2012-04-05] when [[1038: Fountain]] was up.
***The link from the 5th though is from {{xkcd|1021}} [[1021: Business Plan]], the only comic archived on the 5ht to be found.
****The previous link was the last time it was archived while on the front page.

===2012-03-12 - xkcd Holistic Browser===
*[https://web.archive.org/web/20120312185125/http://xkcd.com/ 2012-03-12]
**[[1028: Communication]] was up at the time.
***From here the archive doesn't load the page properly so it is really boring to document. This goes for both first and last day of this text.
**The text:
***New: [https://web.archive.org/web/20120318153220/http://holistic.xkcd.com/ holistic.xkcd.com], the least useful web navigation tool ever.
****The link is now dead, but the link above is to an archived version.
****On that page there is the following text:
*****The XKCD Holistic Browser
*****Because we are all one.
*****Type a web address
*****and you'll be taken to one
*****typed by someone else.
*****URL:
*****Warning: This allows strangers to direct your browser!
*****They may send you to pages containing
*****porn, viruses, or Justin Bieber fanfiction.
*****At the very least, turn on private browsing.
**During the time this header was active the comic [[1031: s/keyboard/leopard/]] came out.
***It had its own [[xkcd_Header_text#Unique_header_text|unique header text]] which thus replaced this text on the front page for two days.
***But it did not replace it on all the other pages so this was the active header text during the entire period, see more here: [[xkcd_Header_text#s.2Fkeyboard.2Fleopard.2F|s/keyboard/leopard/]]
**This lasted till [https://web.archive.org/web/20120327050311/http://xkcd.com/1033 2012-03-27] while [[1034: Share Buttons]] was up.
**But the last archived version with this on the front page was the day before [https://web.archive.org/web/20120326180811/http://xkcd.com// 2012-03-26].
***The link from 27th is from an archived version of [[1033: Formal Logic]].

===Changes not documented yet 1===
*The above is the last documented.
**There will for sure be more changes earlier than this.
*[https://web.archive.org/web/20120311135259/http://xkcd.com/ 2012-03-11] Text before. For next entry below...

[[Category:Design of xkcd.com]]
{{xkcdmeta}}