Retrieves the Gregorian day, month, and year of a given GDateTime. Since 2.26
the return location for the gregorian year, or NULL. out[allow-none]
the return location for the month of the year, or NULL. out[allow-none]
the return location for the day of the month, or NULL. out[allow-none]
See Implementation
Retrieves the Gregorian day, month, and year of a given GDateTime. Since 2.26