"Better days are coming. They are called Saturday…

“Better days are coming. They are called Saturday and Sunday” is a jocular work saying that has been printed on many images. “Cheer up. Better days are coming. They’re called Saturday and Sunday” was printed in Changing Times (The Kiplinger Magazine) in October 1970.

“Better days are just around the corner. They are called Friday, Saturday and Sunday” is a related saying from 2011.

Google Books
October 1970, Changing Times (The Kiplinger Magazine), “Notes on these changing times,” pg. 2, col. 3:
Cheer up. Better days are coming. They’re called Saturday and Sunday.

13 November 1970, Minneapolis (MN) Tribune, pg. 1, col. 7:
Memo From TGF Department
Cheer up. Better days are coming. They’re called Saturday and Sunday.

18 December 1970, Star-Gazette (Elmira, NY), “Looking Around” by Tom Page, pg. 13, col. 6:
Lester Rosenbloom’s door at Corning Community College often has thoughts for the day on it, like: “Cheer up, better days are coming—they’re called Saturday and Sunday.” So reports the College Claxon.

14 January 1972, Lexington (KY) Leader, “The Light Touch” by Al Torstrick (Al Torstrick Insurance Agency, Inc.), pg. 19, col. 5 ad:
Cheer up! Better days are coming. (They’re called Saturday and Sunday.)

28 November 1988, Toronto (ON) Star, “Some consider ‘work’ dirtiest 4-letter word” by George Gamester, pg. A2:
After all, BETTER DAYS ARE COMING. THEY ARE CALLED SATURDAY AND SUNDAY.

Google Books
101 Non Motivational Quotes & Terrible Pick-Up Lines
By Dale Williams
Bloomington, IN: Booktango
2016
Pg. 86:
Better days are coming they’re called Saturday and Sunday.

Twitter
Cali Party Bus‏
@calipartybus
“Better days are coming. They are called Saturday and Sunday!” 🎉
#quote #weekendvibes
7:35 PM - 14 Dec 2017