4 Pa. Stat. § 59
Municipality Defined.--The word "municipality," as used in this act, shall be construed to mean and include any city, borough, town, or township of this Commonwealth.
Motion Picture Exhibitions Defined.--The words "motion picture exhibitions," as used in this act, shall be construed to mean any motion picture exhibitions or showings and sound motion picture exhibitions or showings, together with any orchestral or other instrumental musical or mechanical accompaniment, prelude, playing, or selection in connection therewith or incidental thereto.
Two O'clock Postmeridian Defined.--The words "two o'clock postmeridian," as used in this act, shall be construed to mean "two" o'clock postmeridian eastern standard time, except during the period commencing the last Sunday in April and ending the last Saturday in September inclusive, when such words shall be construed to mean two o'clock postmeridian eastern daylight saving time provided that eastern daylight saving time is the customary time in common use in such municipality during such period.
4 P.S. § 59