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# Type: date
_a date (year, month and day) in an idealized calendar_
URI: [https://CCPBioSim.ac.uk/biosim-schema/date](https://CCPBioSim.ac.uk/biosim-schema/date)
## Type Properties
| Property | Value |
| --- | --- |
| Base | `XSDDate` |
| Type URI | [xsd:date](http://www.w3.org/2001/XMLSchema#date) |
| Representation | `str` |
## Notes
* URI is dateTime because OWL reasoners don't work with straight date or time
* If you are authoring schemas in LinkML YAML, the type is referenced with the lower case "date".
## Identifier and Mapping Information
### Schema Source
* from schema: https://CCPBioSim.ac.uk/biosim-schema/
## Mappings
| Mapping Type | Mapped Value |
| --- | --- |
| self | https://CCPBioSim.ac.uk/biosim-schema/date |
| native | https://CCPBioSim.ac.uk/biosim-schema/date |
| exact | schema:Date |