What do the following words and phrases have in common?

DIAMOND RING
STATUESQUE
SHALL WE DANCE?
LAST HURRAH
FRIENDLY FIRE
GETS A TAN
TSUNAMI WARNING

HINT:
There are seven clues.

Answer:

Hidden in each word or phrase is the three-letter abbreviation of a day of the week:

diaMONd ring
staTUEsque
shall WE Dance
lasT HUrrah
FRIendly fire
getS A Tan
tSUNami warning 

Credit: Jesse Goldberg