Examples

This statement is true Monday through Friday (local time zone). weekdayRange("MON", "FRI")

This statement is true Monday through Friday, in Greenwich Mean Time. weekdayRange("MON", "FRI", "GMT")

This statement is true on Saturdays, local time.weekdayRange("SAT")

This statement is true on Saturdays, in Greenwich Mean Time.weekdayRange("SAT", "GMT")

This statement is true Friday through Monday (the order is important)weekdayRange("FRI", "MON")