Prevents the user from switching months with the calendar.
Specifies that three letter day descriptions should be present.
Just show an indicator, not the full details
text when details are provided. See gtk_calendar_set_detail_func().
Specifies that the month and year should be displayed.
Displays each week numbers of the current year, down the left side of the calendar.
These options can be used to influence the display and behaviour of a Gtk.Calendar.