Key:opening_date
 opening_date
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Expected date of some event - read wiki for precautions  
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| Group: Properties |
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| Status: in use |
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An approximated date in the future when a construction will be finished, used for example on landuse=construction and highway=construction. It is recommended to additionally add check_date=*, which describes the date in the past, when the value of opening_date=* was actually checked.
Format: YYYY-MM-DD (ISO 8601 format)
Avoid combinations such as building=yes + opening_date=future as this would break lots of existing software (see trolltags). This can be avoided by using a lifecycle prefix like construction:building=yes or the specific methods established for roads and railways.
Example: opening_date=2018-11-10 - 10 November 2018
Practical use
http://overpass-turbo.eu/s/Hvm may be used to detect opening_date=* with date in past - so object that probably should be resurveyed as either construction completed or opening date changed.
See also
- start_date=* for already completed features
