1335: Now

|< < Prev Comic #1335 (February 26, 2014) Next > >|

Now

This image isn't actually rotating this quickly, this is a gif. For the current state, see http://xkcd.com/now/

Title text: This image stays roughly in sync with the day (assuming the Earth continues spinning). Shortcut: xkcd.com/now

Explanation

This explanation may be incomplete or incorrect: I've never created a page for a new comic before, so there are many things to fix. Like the transcript. If you can address this issue, please edit the page! Thanks.

The picture rotates every 15 minutes with the Earth, showing which regions are currently at which times of day, going by the Sun. The list of cities and countries doesn't always match the map, because the list takes into account local variations in Time Zones, as well as Summer Time where it is currently being observed in Australia and New Zealand. The map will soon have to move the list of North American cities and regions for Daylight-Saving Time (which is the same thing as Summer Time), but we don't yet know if this will happen.

Every 15 minutes (so far, and presumably forever), the image changes. The names used for the image files refer not to Universal Time as one might expect but rather to the time exactly 12 hours off of that. The picture change seems to happen half-way through a 15-minute time increment (so at 7½ minutes after the hour, then 22½ minutes, then 37½, 52½, and repeating), so that the picture is always correct for the nearest multiple of 15 minutes.

When first posted, the picture was exactly 12 hours off. The name of the image file linked from the page matched Universal Time, rather than being 12 hours off as explained above. Somewhere around 5:10 UTC, this was fixed. The original version also included a listing for Inland Brazil; this could have created a conflict with US East Coast when Daylight-Saving Time begins in the US, and it has been removed.

Transcript

This transcript is incomplete. Please help editing it! Thanks.

Hour (Midnight GMT)		Country/City
0	UK	West Africa
1	Most of Europe	Nigeria
2	Eastern Europe	The Levant	Egypt
3	Iraq			Iran
4	Moscow	Afghanistan
5	Pakistan	India
6
7	South-east Asia
8	China	Singapore	Philippines	Perth
9	Japan	The Koreas
10	Brisbane
11	Most Australian cities
12	Kamchatka
13	New Zealand
14
15	Alaska
16	US West Coast
17	Denver
18	Mexico	Chicago	Texas
19	Eastern Canada	US East Coast
20	Canadian Maritimes
21	Coastal Brazil

Note: Iran and India do not have whole hour GMT offsets.

 add a comment! ⋅  add a topic (use sparingly)! ⋅  refresh comments!

Discussion

Link to comic Link has been fixed. Was pointing to an incorrect url. 14:21, 5 October 2014 (UTC) This doesn't work. Maybe if we added *.xkcd.com/* to the (external) image whitelist or something? 108.162.231.121 07:27, 26 February 2014 (UTC)

A fine suggestion. I'm probably going to shoot for full archival like we did with time, but this is an ample good solution in the meantime. Davidy²²[talk] 07:30, 26 February 2014 (UTC)

Hold on, having wee issues, will resolve soon. Davidy²²[talk] 07:37, 26 February 2014 (UTC)

Here is a scaled animation of every image. The full size version was too big for me to upload. Ti84p (talk) 07:47, 26 February 2014 (UTC)

(Removed the broken link mentioned here above --Kynde (talk) 21:43, 17 May 2015 (UTC))

For Australia and New Zealand, at least, the clock shows local time with summer time factored in. I bet that it undergoes some changes in March and April as various jurisdictions go on or off daylight saving. 108.162.249.224 09:20, 26 February 2014 (UTC)

Good point! I added this to the explanation. —TobyBartels (talk) 13:15, 26 February 2014 (UTC)

There's also British Summer Time and all the other national seasonal adjustments(1)... could you perhaps de-specify the "move the list of North American cities and regions for Daylight-Saving Time (which is the same thing as Summer Time)" statement to remove the inadvertent US-centrism? Maybe "...of northern-latitudes cities for Daylight-Saving Time or equivalent Summer Time designation"..? (Definitely could be better phrased than I just put, though.)

(1) Note, they don't even all switch at the same time, necessarily. If Randall is going to change the basic map template (pre-rotation) for any Summer/non-Summer transition, he's probably going to have to do it multiple times each spring/autumn, as various regions jiggle about. 141.101.99.41 13:52, 26 February 2014 (UTC)

Exactly, they don't all switch at the same time. North America isn't mentioned to be US-centric, it's mentioned because the change happens there first. Sure, we could bring up BST and all the rest, but there's no need to make the discussion longer than necessary. (The original wording also was not US-centric, privileging the non-US term "Summer Time" that's used where it's currently being observed, but somebody changed that.) —TobyBartels (talk) 18:14, 26 February 2014 (UTC)

I made that change just to use the same title as the Wikipedia page to which we are linking. I don't feel strongly about it. --BlueMoonlet (talk) 18:46, 26 February 2014 (UTC)

As for the map itself, I think the title text should provide the exact time for the location under the cursor, by doing calculations for the mouseover event and updating the t.t. accordingly. I imagine it is doable for Randall. For accuracy's sake, the Antarctic region could be excluded. 141.101.89.225 12:19, 26 February 2014 (UTC)

Or maybe someone'll fancy doing it as a userscript. 141.101.89.225 12:23, 26 February 2014 (UTC)

I made a version that the user can rotate themselves. It only loads a single image. http://c0la.s3.amazonaws.com/xkcd1335.html 173.245.53.182 (talk) (please sign your comments with ~~~~)

The gif image is very good to understand this comic. However it would be very nice if it rotated a little slower. Instead of one turn every ten seconds it could be one every minute. 173.245.50.84 14:37, 26 February 2014 (UTC)

When I look a little off-centre, it always seems that South America is about to catch up with Antarctica, but it never does! —TobyBartels (talk) 18:14, 26 February 2014 (UTC)

He used an Azimuthal equidistant projection?!?!? ;_; Swhouseworth (talk) 16:20, 26 February 2014 (UTC)

Yeah, should have been equal area! —TobyBartels (talk) 18:14, 26 February 2014 (UTC)

On the Transcript for this comic the last line erroneously describes the innermost circle as "the Earth as seen from the south pole", when as Swhouseworth correctly points out, this is an Azimuthal equidistant projection centered on the south pole. —Andrewpost (talk) 14:43, 27 February 2014 (UTC)

Question: If there are 24 Hours in a day, why in the description does it go from hour 0 to hour 21? That's only 22 hours. Where are the other 2 hours? Even if it isn't listed on the comic (I think it's the time zones in the Atlantic between Eastern Brazil and the UK - basically UTC-1hr and UTC-2hr), shouldn't there be spaces in the charts showing those hours? I don't think any of the islands in that region use those time zones (opting instead to use GMT - like Iceland for example), but I think those hours should still be included since they are on the static part of the map. Also, it makes sense to me that the center of the words NOON and MIDNIGHT are edges of segments themselves, making 24 segments in total. Randall just couldn't draw those discrete segments and also easily have the words written for our convenience. --Dangerkeith3000 (talk) 16:46, 26 February 2014 (UTC)

Every time zone is used somewhere in international waters (well, every one that's a whole number of hours off of Universal Time), so they certainly should all be included. —TobyBartels (talk) 18:14, 26 February 2014 (UTC)

Added South Georgia as UTC-2 and Cape Verde as UTC-1. According to Wikipedia, coastal Brazil and Greenland are both UTC-2 during the summer, but Brazil just ended summer time last Sunday (Feb. 23), and Greenland won't start until late March. There are approximately no permanently inhabited places that use UTC-2 all year, so I just went with South Georgia because it's historically significant. Fryhole (talk) 20:20, 26 February 2014 (UTC)

Randall's continent naming scheme is interesting. The most commonly taught model in the U.S. has seven continents, but the purple continent is Australia rather than Oceania. The name Oceania is common in Spanish-speaking countries, but those places generally have a six-continent model with the Americas merged. Is Randall's model standard anywhere? Fryhole (talk) 20:00, 26 February 2014 (UTC)

FIBA and, before 2006, FIFA. (In 2006 FIFA moved Australia from Oceania to Asia). As a further parallel neither the sporting bodies nor the comic actually mention Antarctica. Note that the comic does not say these are continents. Oceania has some distinct characteristics, so it often shows up as a "region of the world".

108.162.218.59 19:08, 27 February 2014 (UTC) distinoften shows up as a "region of the world". It has some distinct characteristics, which is why FIFA, FIBA and others treat it as a region. 108.162.218.59 19:08, 27 February 2014 (UTC)

Kamchatka is probably a reference to 850: https://xkcd.com/850/ 108.162.216.48 20:22, 26 February 2014 (UTC)

Hey, I'd just like to note that GIMP "Optimize for GIF" reduced the GIF size to 7.1MiB from current 9.3MiB. If I reduced the colours to 32, which still looked "good enough" in my opinion, the GIF was only 3.5MiB. http://m8y.org/tmp/temp.gif (optimize) http://m8y.org/tmp/temp2.gif (optimize + colour reduction)

It might be worth replacing to improve load times. You might want to make your own since I didn't check frame times or anything, I just ran "index" and "optimize" and then exported 108.162.219.77 (talk) (please sign your comments with ~~~~)

You are right, but that picture should be less then 1MB. I will do some tests, and if it does work I will talk about this. --Dgbrt (talk) 23:51, 26 February 2014 (UTC)

m'k - well. Using 20 colours and scaling it down 50% resulted in 1.1MiB... http://m8y.org/tmp/temp3.gif

I'm now at the time frame at "Rude to call", but nevertheless the PNG files have to be optimized to a GIF, after that an animated GIF should be much smaller. --Dgbrt (talk) 01:03, 27 February 2014 (UTC)

I'm guessing an indexed APNG could be smaller (due to more efficient compression) than a GIF, but unfortunately I don't thing apngasm is as efficient as GIMP's optimize for gif feature.

Does anybody know what clock Randall is using? 199.27.128.75EvanJM42

Randall no doubt knows about the Time Zone Database (http://en.wikipedia.org/wiki/Tz_database) so he may well have coded this page to incorporate seasonal time changes from that database. We'll have to watch what happens. 108.162.219.15 12:59, 27 February 2014 (UTC)

Any idea of a way of using this image as a wallpaper for OSX in a way that updates every 30 minutes? Yes, n00b question, but I cannot think of an easily implemented solution. 108.162.218.77 (talk) (please sign your comments with ~~~~)

Hey. I don't know too much about how OSX does wallpapers, but under Linux, the desktop wallpaper will automatically update if the image is modified. This means you could make a simple shell script that copies (or possibly updates a symlink) to wallpaper.png based upon the current time. The file for the copy or symlink could be referenced as... H=$(date -u +%H); M=$(date -u +%M); FILE="${H}h${M}m.png" I use a similar approach for automatically rotating the image in http://m8y.org/images/sandy_1280_1024_stripped.svg in a cronjob using sed. The sed modification of the svg automatically updates the background. With any luck, you can do the same thing in OSX once you've pointed your wallpaper at a location. 173.245.54.56 (talk) (please sign your comments with ~~~~)

Hello, to the guy asking for a OSX wallpaper, I didn't found a way to do it but I got something pretty close to that. You don't need any scripting skills or anything fancy, just download Geektool[1] from the internet and add an Image Geeklet. In the image URL use the one on the top of this comment section (http://c.xkcd.com/redirect/comic/now) and in the refresh interval select your desired time (I used 900 s roughly 15 minutes, 1800 should work for every 30 minutes). Now, there is a problem but it's beyond my control. The image is not synced with the current time in my country. Just yesterday we changed our clocks because of time savings but apparently the page has not bring forward its clock yet. I don't know who did the awesome job of setting up a page for us to access it but I hope he/she can update it accordingly so we can enjoy an awesome page or if someone else in the community could help. 108.162.221.91 (talk) (please sign your comments with ~~~~)

Hi, I'm the same guy of the above comment. I just checked and it turns out that the page http://c.xkcd.com/redirect/comic/now is synced with xkcd.com/now. so apparently Randall does not change his clock during daylight saving time (he's a well now hater of it isn't he?). So the clock is going to be 1 hour behind until the next daylight saving time change. As a last note regarding the OSX implementation, it's a online version, I'm not really skilled in programming and I haven't tried an offline version yet but if I manage to get an offline version I'll post it here as well. In other comment I have the implementation for windows and it's also 1 hour behind just FYI. 108.162.221.67 (talk) (please sign your comments with ~~~~)

Implementations

Hi, I'm new and a tad confused by how this discussion page editing works, but: I made a time zone converter based on this XKCD comic, over here: http://www.xkcdnow.com - I think it could be fitting to add a link to it somewhere to this article, but I don't wanna come across as spammy, and couldn't find any other explainxkcd articles with an external links section (wikipedia style)... Any thoughts? - wauter

This is a great site! Maybe we could insert an "Implementations" category into the article. If we do so, I could provide another cool one: https://play.google.com/store/apps/details?id=net.phillab.xkcd_now which is a widget for Android - including tribute to explainxkcd -- 173.245.53.146 16:20, 5 March 2014 (UTC)

That sounds good to me. The latest release for my version can be found at https://github.com/BruceJohnJennerLawso/xkcd-Now/releases/tag/1.02 on my Github page. By the way, I like your timezones idea, would you mind if I tried to implement that in mine at some point? BruceJohnJennerLawso (talk) 15:29, 6 March 2014 (UTC)

I would also like the implementation section. If you use a Windows PC, you can use the script found at http://github.com/leipert/xkcd-now-clock to automatically set your Wallpaper to the current status of xkcd now. It also gives you the possibility to add some an digital clock, an analog clock or fix the image to your time zone. leipert 18:02, 6 March 2014 (UTC) 108.162.254.68 (talk) (please sign your comments with ~~~~)

I would love to see an implementation that updates more than once every 15 minutes. I've been trying to find an application that can take two images, and automatically generate the in-between images, i.e. generate 15 images between 00h00m.png and 00h15m.png 162.158.78.154 14:01, 21 September 2017 (UTC) Henry151

Spruced up the Implementations section a bit. A quick tip: if you want to make your link work by clicking on the blue text, add a space after the link in the square brackets, & type in the text, ie [link.com This takes you to link.com!!!] -- BruceJohnJennerLawso (talk) (please sign your comments with ~~~~)

Hi there, I'm Henry151 who made the Linux implementation, I want to make an iPhone app for family and friends, does anybody have any experience with that and want to help me out?

As the US has now hit Daylight Savings, I think we can assume the comic won't be updating for it. 173.245.50.90 02:54, 10 March 2014 (UTC)

WEB links

• Who the hell does register an entire domain [2] for only this comic?
• The JavaScript at the other link doesn't work well for me — but who needs this?

My 0.2 cents. --Dgbrt (talk) 20:57, 10 March 2014 (UTC)

Moscow time has been wrong on the map for years now. For 2011-2014, including when this comic was published, Russia had essentially permanent DST and Moscow was at 2014 UTC+4. But on 26 October 2014, they ended that and have since been permanently at UTC+3. Moscow should be at the same spot as Iraq, slightly ahead of Iran, instead of behind it. Something to add to the technical notes section, perhaps? 162.158.183.197 15:01, 10 September 2020 (UTC)

Someone just moved the 'Moscow' entry from +4 to +3, which of course is technically correct right now. But the comic (and the live xkcd version, and the Android app version I use that is inspired by it) still places it at a +4 position. I reverted it, with modification to directly explain this issue (I should have said "a couple of years", will go back and change that again, 'twas a slip)... Without checking, I'm wondering if there are other differences, over the last eightish years. Perhaps people could check for other possible 'now wrong' entries. If not shuffle the image-text around in an (auxilliary) updated version on fan-platforms such as this. 172.71.242.176 00:10, 22 February 2024 (UTC)

Who made it spin so much faster?! Beanie (talk) 10:23, 17 December 2020 (UTC)

Timed Links Fix

I've just condensed the raw link dump into a table, each hour gets its own two cells with a label cell and another cell with the four image links related to that hour inside it. (unable to sign properly, ISP is using IPv4 proxy.)172.69.69.250 02:40, 3 May 2022 (UTC)

Looks nice. But was a bit too wide. Overflowed the usual page style (at least for me, YMMV). Possibly three row-sets of eight hours would fit, but it was easier (marginally) to trivially splice out into 4x6hr chunkettes and that definitely isn't too wide nor (IMO) too lengthy.

I hope you approve. (And I'm 'not signing properly' because I've got nothing else to sign with, whoever you are. ;). ) 172.70.162.147 05:21, 3 May 2022 (UTC)