&reftitle.constants;

The `DATE_` constants are defined and they offer standard date representations, which can be used along with the date format functions (like `date`).

Following constants specify a format returned by functions `date_sunrise` and `date_sunset`.

`SUNFUNCS_RET_TIMESTAMP` (`int`)

- Timestamp

`SUNFUNCS_RET_STRING` (`int`)

- Hours:minutes (example: 08:02)

`SUNFUNCS_RET_DOUBLE` (`int`)

- Hours as floating point number (example 8.75)