Subtract a time interval from this object.
Subtract from this object the value of the specified rhs object, and return a reference providing modifiable access to this object. If 24 == hour() on entry, set the hour attribute of this object to 0 before performing the subtraction. The behavior is undefined unless the resulting value is valid for Datetime (see isValid).
reference to this object
| Name | Description |
|---|---|
| rhs | time interval to subtract |