Template:Date serial/doc

Template:Documentation subpage This template returns the date serial in year for a date specified by month number and day of month. By default the year is considered non leap, but this may be overridden.

Syntax:

{{Date serial|month number|day of month}}

{{Date serial|month number|day of month|year}}

{{Date serial|month number|day of month|leapyear=is leap}}

• The year parameter is optional, if specified, the named leapyear parameter is ignored.
• The named leapyear parameter (optional, default value 0, unless year is specified) is non-zero to get the proper date serial on dates starting at March 1st on leap years.

Examples

• {{date serial|{{CURRENTMONTH}}|{{CURRENTDAY}}|leapyear={{isLeapYear}}}} →
• {{date serial|1|1}} → 1
• {{date serial|1|1|2000}} → 1
• {{date serial|1|1|leapyear=1}} → 1
• {{date serial|2|28}} → 59
• {{date serial|3|1}} → 60
• {{date serial|3|1|leapyear=0}} → 60
• {{date serial|3|1|1999}} → 60
• {{date serial|3|1|leapyear=1}} → 61
• {{date serial|3|1|2000}} → 61
• {{date serial|3|26}} → 85
• {{date serial|5|1}} → 121
• {{date serial|12|31}} → 365
• {{date serial|12|31|leapyear=1}} → 366
• {{date serial|12|31|1999}} → 365
• {{date serial|12|31|2000}} → 366

Days since September 1st:

• {{#expr: {{date serial|{{CURRENTMONTH}}|{{CURRENTDAY}}}} - {{date serial|9|1}} }} → 110

First Sunday in November is November Template:Weekday in month, 2025

• {{date serial|11|{{Weekday in month|{{CURRENTYEAR}}|11|0|1}} }} →

Self test

Test	Result
{{date serial|1|13}}	Pass
{{date serial|2|12}}	Pass
{{date serial|3|16}}	Pass
{{date serial|4|1}}	Pass
{{date serial|4|2|leapyear=1}}	Pass

See also

• Template:Tl for the number of days since 0 A.D accounting for leap years.
  
• Template:Tl for the number of days between any two dates.