Talk:2236: Is it Christmas?

according Wayback Machine, the site still says NO even on Christmas. --valepert (talk) 21:56, 2 December 2019 (UTC)

Hmmm, maybe it will be fixed this year. I imagine everybody spammed the guy on twitter when it didnt work last year. 172.68.132.155 22:06, 2 December 2019 (UTC)

It checks your system time

It uses the new Date() constructor to check whether it is Christmas, which uses your system time. Thus, the Wayback won't get anything, but changing your system time will. Kay? That's right, Jacky720 just signed this (talk | contribs) 22:14, 2 December 2019 (UTC)

Okay so looking at isitchristmas.com, there's a comment at the top of the page saying to look at the console, but I don't see anything in there, anyone know what that might be about? Also at the bottom of the html file, the bottommost <script> tag looks like it might contain code for a chat client? I don't know JS so I'm unsure, but I tried changing all the related "false" values to "true" that looked relevant and nothing happened, so idk. Maybe someone else can figure it out. 172.68.132.155 22:03, 2 December 2019 (UTC)

(I'm the dev.) Check back again closer to Christmas, on 12/23 or 12/24. Konklone (talk) 00:55, 3 December 2019 (UTC)

I mean, I kind of find that suspect. 172.68.47.234 01:39, 3 December 2019 (UTC)

Well, one way to put it is that the overall probability of a false negative is 0.27%, which doesn't seem too bad, but the conditional probability of a false negative given that it's Christmas is 100%, which is horrid. --IByte (talk) 22:37, 2 December 2019 (UTC)

Of course it depends on your definition of "It's Christmas". The figure is right if you just mean Christmas Day and ignore the Julian vs Gregorian issue, but not you subscribe to "the 12 days of Christmas" = Christmas ... Just saying ;-) RIIW - Ponder it (talk) 23:53, 2 December 2019 (UTC)

Every year, people ask me about including multiple definitions of Christmas, but I think for my own sanity it's going to keep looking just at 12/25. ;) Konklone (talk) 00:57, 3 December 2019 (UTC)

How do we know Randall's version is wrong on Christmas? Has anyone set their system clock to Dec 25 and checked it? Barmar (talk) 02:14, 3 December 2019 (UTC)

Have tested; Randall's displayed "no" as per main image. isitchritmas displayed "yes" as per explanation. RedHillian (talk) 02:44, 3 December 2019 (UTC)

It may be Randall uses Server-Time, and not client-time like isitchristmas.com - Also, in the official Calendars, there are two Christmas days, first and second day of Christmas. I think Randall went only for the gifting day, which is different in many countries anyway. My kids get there presents on Christmas eve (24 December), their friends mostly on 6 December (Sint Nicolas) (or the evening before). 141.101.77.62 07:45, 3 December 2019 (UTC)

Based on his 99.73% accuracy comment, I assume the comic is a static image, and will always show "NO", even on Christmas day. I think that is the whole joke, that his comic is correct 364 (+ leap days) of the year, when it is not Christmas. 172.69.34.158 08:23, 3 December 2019 (UTC)

Of course this is a static image, that is the whole point. ;-) In Demark we also have the is it Friday which at least is easier to check if it works, as it changes from No (Nej) to Yes (Ja) once a week. As mentioned above in Denmark the isitchristmas answers in Danish with a Nej. --Kynde (talk) 08:34, 3 December 2019 (UTC)

About "when is christmas". Christmas consists of two days, which makes the calculation of predicted correctness too optimistic. (99,45% for 363/365 and for 364/366; 99,38% for 363/365.25)141.101.77.62 07:45, 3 December 2019 (UTC)

"In the western world celebrated on 25th" is not correct. For UK,US and Canada and probably a lot others it might be true, german and I think spanish speaking countries not.

No no. Even when you celebrate Christmas Eve on December 24th (as also in Denmark) we call the 25th Christmas Day. Even if you also celebrate the 2nd Christmas day, there is only one day a year that it is Christmas, and that is the 25th of December. That is when Christians claim Jesus was born. Of course I celebrate the Winter solstice (and accept that I do this a few days off, since that is when I can have the day off.) In Denmark we count the days up till the 24th and celebrate in the evening, (as the Vikings always did, because the new day began the sun set.) We do not look at the 12 days after. --Kynde (talk) 08:34, 3 December 2019 (UTC)

The XKCD page has the additional advantage of being equally accurate whether you follow Western or Eastern Orthodox calendars, or whatever calendar you choose! --Quantum7 (talk) 08:39, 3 December 2019 (UTC)

Reminds me of 937: TornadoGuard in subject matter.--Henke37 (talk) 09:47, 3 December 2019 (UTC)