Wikipedia:Date math

Date math on Wikipedia is done with variables, templates and the #time parser function.

In articles, it is almost always preferred to specify a specific static date for a statement or event rather than an automatically generated date. Wikipedia:As of describes how to properly specify such dates.

Current date and time

Built-in variables	Templates based on them	What you see	Comments
{{CURRENTTIMESTAMP}}		20260729024117
{{CURRENTYEAR}}		2026
	{{UTC}}	2026-07-29 02:41 UTC	also uses {{CURRENTMONTH}} {{CURRENTDAY2}} {{CURRENTTIME}}
	{{CURRENTDATE}}	02:41, Wednesday, July 29, 2026 (UTC)	also uses {{CURRENTTIME}} {{CURRENTDAYNAME}} {{CURRENTMONTHNAME}} {{CURRENTDAY}}
	{{CURRENTJULIANDAY}}	2461250.6120023	current Julian day also uses {{CURRENTMONTH}} {{CURRENTDAY}} {{CURRENTHOUR}} {{CURRENTMINUTE}} {{CURRENTSECOND}}
{{CURRENTMONTH}}		07
	{{CURRENTMONTH1}}	7	trims leading zero
{{CURRENTMONTHNAME}}		July
	{{Month+1}}	August
	{{Month-1}}	June
	{{Month-2}}	May
{{CURRENTDAY}}		29	day of month
{{CURRENTDOW}}		3	day of week
{{CURRENTDAYNAME}}		Wednesday
	{{#time:l|-1 day}}	Tuesday
	{{#time:l}}	Wednesday
	{{#time:l|+1 day}}	Thursday
Any variable or template with a resolution of smaller than one day should not be placed in articles. These variables only indicate when the article was parsed and cached; they may lag by many hours or even days compared to the time the page is viewed.
{{CURRENTTIME}}		02:41
{{CURRENTHOUR}}		02
	{{#time:H|+1 hour}}	03
	{{Current hour}}	2	trims leading zero
{{#time:i}}		41
	{{CURRENTMINUTE}}	41
	{{Current minute}}	41	trims leading zero
{{#time:s}}		17
	{{CURRENTSECOND}}	17

Computed date and time

Template name	Usage	Output	Comment
{{Ordinal date}}	{{Ordinal date|year=2007|month=03|day=15}}	74	returns ordinal date (day of year)
	{{Ordinal date|year=2008|month=03|day=15}}	75	+1 due to leap year in 2008
{{WEEKDAY}}	{{WEEKDAY|2009|08|25}}	2	returns day of week
	{{WEEKDAYNAME|{{WEEKDAY|2009|08|25}}}}	Tuesday
{{JULIANDAY}}	{{JULIANDAY|2009|08|25}}	2455069
	{{JULIANDAY|{{CURRENTYEAR}}|{{CURRENTMONTH}}|{{CURRENTDAY}}}}	2461251	Nesting templates to get the value of the current Julian day with no decimal portion. Useful for date math between a set point and the current date.
{{JULIANDAY.TIMESTAMP}}	{{JULIANDAY.TIMESTAMP|2455069}}	20090825120000	same format as {{CURRENTTIMESTAMP}}
	{{#time:D Y-m-d|{{JULIANDAY.TIMESTAMP|2455069}}}}	Tue 2009-08-25
{{JULIANDAY.DAYNAME}}	{{JULIANDAY.DAYNAME|2455069}}	Tuesday	same format as {{CURRENTDAYNAME}} Note: 2455069 mod 7 = 1
	{{JULIANDAY.DAYNAME|{{CURRENTJULIANDAY}}}}	Wednesday

Julian dates or day numbers can be used for date calculations. A simple example follows:

1. 90 days from 25 December 2006 is:
   • Code: {{#time:j F Y|{{JULIANDAY.TIMESTAMP|{{JULIANDAY|2006|12|25}}+90}}}} → 25 March 2007
2. 90 days from 25 December 2007 is:
   • Code: {{#time:j F Y|{{JULIANDAY.TIMESTAMP|{{JULIANDAY|2007|12|25}}+90}}}} → 24 March 2008 (1 day less than first example due to leap year in 2008)

Fancy stuff

Today is Wednesday 29 July 2026	Tomorrow Thursday 30 July 2026
{{today cell}}	{{tomorrow cell}}

See also

• Category:Date mathematics templates
• Help:Variables