Key:opening_date
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 opening_date
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| Description |
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Expected date of some event - read wiki for precautions. Use YYYY-MM-DD format.  
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| Group: Properties |
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| Useful combination |
| Status: in use |
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| Wikidata |
| Property:P1619 |
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
Opening dates in the past should be resurveyed as either construction completed or opening date changed:
- Sophox query for overdue openings globally
- Overpass API query for overdue openings locally
See also
- start_date=* for already completed features