Answer:

TGIF

Answer	Crossword Clue
TGIF	End of the week acronym
TGIF	Happy-hour letters, perhaps
TGIF	End of week cry

TGIF	Late-week cube farm cry
TGIF	"Weekend ahoy!"
TGIF	Chant in a 2011 Katy Perry single
TGIF	Weekly shout for some
TGIF	Workweek-ending cry
TGIF	"What a week!"
TGIF	Weekend-welcoming eggsclamation
TGIF	Week-ending abbr.

TGIF	Week-ending letters
TGIF	Weekend-welcoming letters
TGIF	Weekend welcome
TGIF	Four happy letters?
TGIF	Pre-weekend cry
TGIF	Letters of relief
TGIF	"Work week's over!"
TGIF	Work-weary whoop

TGIF	Post-Thur. whoop
TGIF	Wage-slave's letters
TGIF	End-of-the-week exclamation
TGIF	Wage-slave's refrain
TGIF	End-of-the-week business letters?
TGIF	Work-weary cry
TGIF	"Finally, the weekend!"
TGIF	"No work tomorrow!"

TGIF	End-of-the-week letters
TGIF	End-of-week mantra
TGIF	Pre-weekend mantra
TGIF	"At last, the weekend!"
TGIF	Workplace letters of relief
TGIF	"What a relief!" relative
TGIF	Nine-to-fiver's "Aah!"
TGIF	Weary worker's mantra

TGIF	Weekly "Whew!"
TGIF	"Hooray! The weekend!"
TGIF	"Tomorrow is Saturday!"
TGIF	Working stiff's relieved cry
TGIF	Cry from a cubicle