Function module: f4_date

You can use this function to obtain the F4.

Input parameters:
Date_for_first_month: date of initial selection
Display: whether to return the selected date. If it is 'x', no value is returned.
Factory_calendar_id: specify a factory calendar
Gregorian_calendar_flag: Use the Gregorian calendar instead of the factory calendar.
Holiday_calendar_id: Specifies the calendar of a vacation.
Progname_for_first_month: If the date_for_first_month parameter is not specified, the system automatically obtainsProgramAs the initial date.

Output parameters:
Select_date: Selected date
Select_week
Select_week_begin
Select_week_end
No value is obtained for the last three output parameters in my test.