"Sunday" is a 1926 song written by Chester Conn, with lyrics by Jule Styne, Bennie Krueger, Ned Miller, which has become a jazz standard recorded by many artists. The first recording in October 1926 was made by Jean Goldkette and His Orchestra. The tune has been fitted out to various lyrics, but best known in the original version of British-American songwriter Jule Styne: "I'm blue every Monday, thinking over Sunday, that one day that I'm with you"
References
Sunday (Chester Conn song) Wikipedia(Text) CC BY-SA