Template:YMD to ISO

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Template:YMD to ISO converts a date in YMD format (e.g. 2000 January 17) to ISO 8601 format (e.g. 2000-01-17). Any input which is not a valid DMY date is passed through unchanged. This template is designed to preprocess dates for use with the #time parser function, which is unable to convert YMD dates, and for use with templates such as {{Date}} or {{ISO date}} which are implemented using the #time parser function.

Usage

{{YMD to ISO | <date in YMD format> }}

Examples

Full month names

• {{YMD to ISO| 2000 January 17 }} → 2000-01-17
• {{YMD to ISO|2000 February 29}} → 2000-02-29
• {{YMD to ISO|2001 February 28}} → 2001-02-28
• {{YMD to ISO|2000 december 17}} → 2000-12-17
• {{YMD to ISO|2000 DECEMBER 17}} → 2000-12-17

Abbreviated month names

• {{YMD to ISO|2000 Sep 1}} → 2000-09-01
• {{YMD to ISO|2000 Sept 1}} → 2000-09-01
• {{YMD to ISO|2000 Sept. 1}} → 2000-09-01
• {{YMD to ISO|2000 dec 1}} → 2000-12-01
• {{YMD to ISO|2000 DEC. 1}} → 2000-12-01

Dates in other formats (unchanged)

• {{YMD to ISO|1 December 2000}} → 1 December 2000
• {{YMD to ISO|December 1, 2000}} → December 1, 2000

Used as input

With the {{#time}} parser function:

• {{#time: r|{{YMD to ISO|2000 January 17}}}} → Mon, 17 Jan 2000 00:00:00 +0000
• without {{YMD to ISO}}: {{#time: r|2000 January 17}} →

With the {{Date}} template:

• {{Date|{{YMD to ISO|2000 January 17}}|dmy}} → 17 January 2000
• without {{YMD to ISO}}: {{Date|2000 January 17|dmy}} → 2000 January 17 (not converted to dmy)

With the {{ISO date}} template:

• {{ISO date|{{YMD to ISO|2000 January 17}}|dmy}} → 2000-01-17
• without {{YMD to ISO}}: {{ISO date|2000 January 17|dmy}} →

See also

• Template:YMD to ISO/testcases
• Help:Time function
• mw:Help:Extension:ParserFunctions § #time

Date and time templates

Multiple units of time

Type	Adjustable	Current	Last	Next
Date and time	{{time}}	{{Currentdate}} (MDY) {{Plain now}} (DMY) {{Now}} (DMY in a complete sentence) {{Simple now}}
Date only	{{Dateonly}} {{Datedow}} (Has the day of the week)	{{Date}} (Chose format) {{DATE}} (prefixed by date=) {{TODAY}} (DMY)	{{Yesterday}} {{Day-1}}	{{Tomorrow}} {{Day+1}}
Time only	{{Timeonly}}	{{CURRENTTIME}} (12 h format) {{CURRENTTIME24}} (24 h format)
Banners		{{Right now}} (Blue with time and number of Wikipedia articles)
Timestamp		{{Timestamp}} (Format YYYYMMDDhhmmss)

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Single units of time

Unit of time	Adjustable	Current	Last	Next
SECOND		{{CURRENTSECOND}}
MINUTE		{{CURRENTMINUTE}}
HOUR		{{CURRENTHOUR}}
WEEK		{{CURRENTWEEK}} {{CURRENTWEEKOFMONTH}}
Day of Week	{{Dow}}	{{CURRENTDAYNAME}} {{CURRENTWEEKDAYABBREV}} {{CURRENTWEEKDAY}}
MONTH	{{MONTHNAME}} {{MONTHABBREV}} {{MONTHNUMBER}} {{MONTH}} (zero padded)	{{CURRENTMONTHNAME}} {{CURRENTMONTHABBREV}} {{CURRENTMONTH1}} {{CURRENTMONTHDAYS}}	{{LASTMONTHNAME}}	{{NEXTMONTHNAME}}
Day of Month		{{CURRENTDAY}} {{CURRENTDAY2}} (zero padded)
YEAR		{{CURRENTYEARCC}} {{CURRENTYEARYY}} {{CURRENTISOYEAR}} {{CURRENTYEAR}}	{{LASTYEAR}}	{{NEXTYEAR}}
Day of Year		{{CURRENTDAYOFYEAR}}
DECADE	{{DECADE}}	{{CURRENTDECADE}}
CENTURY	{{CENTURY}}	{{CURRENTCENTURY}}
MILLENNIUM	{{MILLENNIUM}}

Date and time templates made for substitution:

Month:
{{Lmonth}} produces Oct
{{Nmonth}} produces Dec
{{LastMonth}} produces October 2025
{{NextMonth}} produces December 2025

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Individual templates

• {{Calendar}}
• {{Calendar clock with Wikipedia stats}}
• {{Clock}}
• {{Digital clock}}
• {{Digital clock and date}}

Categories of templates

• Category:Time, date and calendar templates
• Category:Date-computing templates
• Category:Date-computing templates based on current time
• Category:ISO date templates
• Category:Calendar templates

The above documentation is transcluded from Template:YMD to ISO/doc. (edit | history)
Editors can experiment in this template's sandbox (create | mirror) and testcases (create) pages.
Add categories to the /doc subpage. Subpages of this template.