Increase this time by interval; return midnight-boundary crossings.
Increase the value of this time object by the specified interval of time, and return the (signed) number of times that the 23:59:59.999999 - 00:00:00.000000 boundary was crossed in performing the operation. The behavior is undefined unless the number of crossings that would be returned can be represented by an int.
the (signed) number of midnight-boundary crossings
| Name | Description |
|---|---|
| interval | datetime interval to add |