[ Version ( since = "4.14" ) ]
public void set_month (int month)
Sets the month for the selected date.
The new date must be valid. For example, setting the month to 1 (February) when the day is 31 will fail.
| this |
a `GtkCalendar` |
| month |
The desired month for the selected date (as a number between 0 and 11). |