58 Pa. Code § 111.72
The following words and terms, when used in this chapter, have the following meanings, unless the context clearly indicates otherwise:
Holidays—Federally-recognized holidays.
Weekdays—Monday through Friday.
Weekends—Saturday and Sunday.
The provisions of this § 111.72 adopted June 3, 1994, effective June 4, 1994, 24 Pa.B. 2795.