Key:date
 date
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| Description |
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Date when related event happened (memorials), or is a clock showing the current date in addition to showing time. 
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| Group: properties |
| Used on these elements |
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| Useful combination |
| See also |
| Status: in use |
| Tools for this tag |
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The key date has two different uses:
- 1. Date when the related event happened
historic=*(Status: in use) - 2. Does a clock
amenity=clockalso show the current date? (Status: "approved"
).
Many current uses should be using another tag from the list below (status February 2026). It's suggested to deprecate this key and replace it with two others, see community:135862.
Formatting historic=*
Dates use the ISO 8601 system, which is based on the Gregorian calendar.
Caution: ISO8601 uses the format yyyy-mm-dd, not the common North American model of mm-dd-yyyy
- Examples:
- 2010
- where the year is known, but no more
- 0897 (for 897 AD)
- 1848-07
- where the year and month are known
- 2010-03-31
- for where the full date is known, using the format yyyy-mm-dd
For centuries, use the C-notation.
- Example:
To indicate a time period, use ".." between the beginning and the end.
- Example:
- 2010..2012
- years 2010 to 2012
To indicate several, separate dates, use ";" between the dates.
- Examples:
- 2001;2026
- year 2001 and year 2026
- 2010-01-01;2011-12-31
- for 1 January 2010 and 31 December 2011
Formatting amenity=clock
date=yes– The clock also shows the current date. Default value: nodate=no– The clock does not show the current date.
See also
survey:date=*- Date of last time the feature was surveyedcheck_date=*- Date when the feature was last surveyedstart_date=*- Date when feature opened, the construction of the feature finished, or the feature was first at locationconstruction_date=*- Date when the construction of the feature finishedyear_of_construction=*- Year when the construction of the feature finished, year range when the construction took placeartwork:creation_year=*- Date when an artwork was createdsource:date=*
Possible tagging mistakes
This tag was also heavily used for other, unknown reasons (for example date=2014 added to most minor roads in one rectangle in Mexico)
Some uses by mappers included specifying date when feature was mapped. See survey:date=* or check_date=* instead.