"Cuando Vuelva A Tu Lado" ("When I Return To Your Side") (Grever) is the original Spanish title of "What a Difference a Day Made". The song was published in 1934. The English version with lyrics by Stanley Adams "What a Difference a Day Made" was a hit for the Dorsey Brothers Orchestra in the same year.

Dinah Washington (Ruth Lee Jones) won a Grammy for her cover in 1959 when "What a Diff'rence a Day Makes" hit the top ten.