The song was first recorded in 1974 by Jim Haas with a group of other session singers for the first two seasons. These versions of the song were only used during the closing credits of seasons 1-2, with "Rock Around the Clock" by Bill Haley and His Comets being the opening theme. The song was later recorded in 1975 with different lyrics for both the opening and closing credits for seasons 3-10. Pratt & McClain released the song as a single in 1976 of their album Pratt & McClain Featuring Happy Days. Bobby Arvon later recorded the song in 1983 for the opening and closing credits of season 11, with the same lyrics as the version used for seasons 3-10.