View source for Template:Gregorian serial date/doc

This template gives the [[wikipedia:Gregorian calendar|Gregorian]] serial day. This is the numbers of days from the start of 1 A.D. (Monday, 1 Jan 1 = 1). (In the Gregorian Calendar there is no year 0) This template should handle all leap year exceptions including the 100 and 400 year rule. By default this template gives the serial for today. To find the serial for another date fill in the date into this code: '''<nowiki>{{Gregorian serial date|month = |day = |year = }}</nowiki>

'''Today's date is {{Gregorian serial date}}.'''

* <nowiki>{{gsd|year=1|month=1|day=1}}</nowiki> gives {{gsd|year=1|month=1|day=1}}
* <nowiki>{{gsd|year=2000|month=12|day=31}}</nowiki> gives {{gsd|year=2000|month=12|day=31}} (5 times the number of days of a cycle, 146,097)
* <nowiki>{{gsd|year=1985|month=1|day=1}}</nowiki> gives {{gsd|year=1985|month=1|day=1}}
* <nowiki>{{gsd|year=1985|month=4|day=12}}</nowiki> gives {{gsd|year=1985|month=4|day=12}}
* <nowiki>{{gsd|year=1981|month=8|day=12}}</nowiki> gives {{gsd|year=1981|month=8|day=12}}
* <nowiki>{{gsd|year=1953|month=10|day=2}}</nowiki> gives {{gsd|year=1953|month=10|day=2}}

== Use with caution on in-universe pages ==
Please note that this template, and really everything in [[:category:age calculation templates]] should be '''used with caution''' on in-universe pages.  They all assume that '''there is no year zero''', which [[T:YEARS|our in-universe rule on years]] does not.  This is because there are several in-universe sources, not the least of which is the [[Doctor Who (TV story)|1996 movie]] and its novelisation, which assume that there ''is'' a year zero.  For ease of calculation, our in-universe time calculation templates, like {{tl|timeline}}, are therefore based on a different principle than this one — namely, that year 0 '''does exist'''. 

In practice, this means absolutely ''nothing'' to the calculation time of between two dates, so long as you're trying to figure out the distance between any two dates after 1/1/1 [[AD]].
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