Weekend (Tonight Is Party Time)
From The Art and Popular Culture Encyclopedia
"Weekend" is a 1978 musical composition produced by Patrick Adams and written by James Calloway and Leroy Burgess. Lead vocals were by Christine Wiltshire, then wife of Patrick Adams. It was released as a single and as a track on the album Patrick Adams Presents Phreek.
The composition was covered in 1981 by Class Action on Sleeping Bag Records's first single (with mixes by Morales and Munzibai and Larry Levan, and reworked for many Todd Terry tracks starting with the 1988  on Fresh Records.
It added the sample "What we're gonna do right here is go back, way back, back into time," taken from "Troglodyte" by the Jimmy Castor Bunch.