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Public-images-osm logo.svg construction_date
Baujahr 1928 - panoramio.jpg
Indicates the date the construction of the feature was finished. Show/edit corresponding data item.
Group: annotations
Used on these elements
may be used on nodesmay be used on waysmay be used on areas (and multipolygon relations)may be used on relations
See also
Status: in use

construction_date=* is one of several keys to indicate the date the construction of the feature was finished.

By far the most widely used key, however, is start_date=*.


Usually the date is written in YYYY-MM-DD format according to  ISO 8601. It is based on the  Gregorian calendar.

In the vast majority of cases only the year is given.

See also

  • start_date=* - Date when feature opened or the construction of the feature finished.
  • end_date=* - This tag for an end-date is for special use only, not in main OpenStreetMap. - Read documentation and all warnings first! - Possible use is e.g. OpenHistoricalMap.
  • opening_date=* - Expected date in the future when a construction will be finished and feature will be opened. Use YYYY-MM-DD format.
  • year_of_construction=* - Displays the year(s) of construction of a characteristic and can be assigned to different objects.
  • taginfo '_date' search
  • Comparison of life cycle concepts
  • OSM-4D for ideas about a viewer showing features in 3D extended over time.