imported>JMF: /* Sources */Correct ref to Calendrical Calculations, per talk oage

2025-07-17T20:24:16Z

Sources: Correct ref to Calendrical Calculations, per talk oage

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{{Documentation subpage}}
==Purpose==
This template provides today's date in a variety of calendars. Only calendars with a substantial user base are included.

At present, the date changes one minute after 23:59 UTC+00. For users in other time zones, this can be up to 13 hours after (New Zealand summer time) or 11 hours before (American Samoa) the date changes in local time.

==Sources==
The following calendars are listed:

* [[Gregorian calendar]] (uses [[:mw:Help:Extension:ParserFunctions##time|MediaWiki's #time function]] for calculation)
* [[Islamic calendar]] (uses the <code>xm</code> portion of [[:mw:Help:Extension:ParserFunctions##time|MediaWiki's #time function]] for calculation)
* [[Hebrew calendar]] (uses the <code>xj</code> portion of [[:mw:Help:Extension:ParserFunctions##time|MediaWiki's #time function]] for calculation)
* [[Coptic calendar]] (uses {{tl|COPTICDATE}} for calculation)
* [[Solar Hijri calendar]] (uses the <code>xi</code> portion of [[:mw:Help:Extension:ParserFunctions##time|MediaWiki's #time function]] for calculation)
* [[Bengali calendar]] (uses {{tl|BENGALIDATE}} for calculation)
* [[Julian calendar]] (uses {{tl|JULIANCALENDAR}} for calculation)

Any problems with the calculated dates may be caused by the behavior of the templates or functions listed above.

{{as of|July 2025}}, the algorithms used by MediaWiki to derive these figures are not documented although the code is available. However, the general principles used to compute them are described in
* {{cite book |first1=Nachum |last1=Dershowitz |first2=Edward M. |last2=Reingold |title=Calendrical Calculations |edition=Third |location=[[Cambridge]] |publisher=Cambridge University Press |date=2008 |url=https://archive.org/details/calendricalcalcu0000ders/mode/1upr |isbn=9780521885409 |oclc=144768713}}

== Usage ==
The template takes no parameters.

<includeonly>{{Sandbox other||

[[Category:Date-computing templates based on current time]]
}}</includeonly>

Template:Infobox calendar date today/doc - Revision history

imported>JMF: /* Sources */Correct ref to Calendrical Calculations, per talk oage