"What a Diff'rence a Day Made '' is a popular song originally written in Spanish by María Grever, a Mexican songwriter, in 1934 with the title, "Cuando vuelva a tu lado '' ("When I Return to Your Side ''). The song is also known in English as "What a Diff'rence a Day Makes '', as popularized by Dinah Washington.
who sang what a difference a day makes in going in style
Dinah Washington