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
editBuilt-in variables | Templates based on them | What you see | Comments |
---|---|---|---|
{{CURRENTTIMESTAMP}} | 20240911090923 | ||
{{CURRENTYEAR}} | 2024 | ||
{{UTC}} | 2024-09-11 09:09 UTC | also uses {{CURRENTMONTH}} {{CURRENTDAY2}} {{CURRENTTIME}} | |
{{CURRENTDATE}} | 09:09, Wednesday, September 11, 2024 (UTC) | also uses {{CURRENTTIME}} {{CURRENTDAYNAME}} {{CURRENTMONTHNAME}} {{CURRENTDAY}} | |
{{CURRENTJULIANDAY}} | 2460564.8815162 | current Julian day also uses {{CURRENTMONTH}} {{CURRENTDAY}} {{CURRENTHOUR}} {{CURRENTMINUTE}} {{CURRENTSECOND}} | |
{{CURRENTMONTH}} | 09 | ||
{{CURRENTMNTH}} | 9 | trims leading zero | |
{{CURRENTMONTHNAME}} | September | ||
{{Month+1}} | October | ||
{{Month-1}} | August | ||
{{Month-2}} | July | ||
{{CURRENTDAY}} | 11 | day of month | |
{{CURRENTDOW}} | 3 | day of week | |
{{#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}} | 09:09 | ||
{{CURRENTHOUR}} | 09 | ||
{{#time:H|+1 hour}} | 10 | ||
{{Current hour}} | 9 | trims leading zero | |
{{#time:i}} | 09 | ||
{{CURRENTMINUTE}} | 09 | ||
{{Current minute}} | 9 | trims leading zero | |
{{#time:s}} | 23 | ||
{{CURRENTSECOND}} | 23 |
Computed date and time
editTemplate 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}} | 1 | returns day of week |
{{WEEKDAYNAME|{{WEEKDAY|2009|08|25}}}} | Tuesday | ||
{{JULIANDAY}} | {{JULIANDAY|2009|08|25}} | 2455069 | |
{{WEEKDAYNAME|{{JULIANDAY|2009|08|25}}}} | Tuesday | Note: 2455069 mod 7 = 1 | |
{{JULIANDAY|{{CURRENTYEAR}}|{{CURRENTMONTH}}|{{CURRENTDAY}}}} | 2460565 | 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 |
Julian dates or day numbers can be used for date calculations. A simple example follows:
- 90 days from 25 December 2006 is: 25 March 2007
- Code: {{#time:j F Y|{{JULIANDAY.TIMESTAMP|{{JULIANDAY|2006|12|25}}+90}}}}
- 90 days from 25 December 2007 is: 24 March 2008 (1 day less than first example due to leap year in 2008)
- Code: {{#time:j F Y|{{JULIANDAY.TIMESTAMP|{{JULIANDAY|2007|12|25}}+90}}}}
Fancy stuff
edit{{today cell}} | {{tomorrow cell}} |