number (optional, default = 0) - Offset in months from the currently selected Calendar month, positive numbers indicating future months.
structure - CalendarMonthInfo
Month index (1-12)
Year at the offset date (2004+)
Number of days in the month (28-31)
Weekday on which the month begins (1 = Sunday, 2 = Monday, ..., 7 = Saturday)
This function returns information based on the currently selected calendar month (per C_Calendar.SetMonth). Prior to opening the calendar for the first time in a given session, this is set to C_Calendar.GetMinDate (i.e. November 2004).