Season 0 of Happy Days premiered on January 12, 1976.

Season 1 of Happy Days premiered on January 15, 1974.

This is a list of episodes from the first season of Happy Days.

Season 2 of Happy Days premiered on September 10, 1974.

This is a list of episodes from the second season of Happy Days.

Season 3 of Happy Days premiered on September 9, 1975.

Season 4 of Happy Days premiered on September 21, 1976.

Season 5 of Happy Days premiered on September 13, 1977.

Season 6 of Happy Days premiered on September 12, 1978.

Season 7 of Happy Days premiered on September 11, 1979.

Season 8 of Happy Days premiered on November 11, 1980.

Season 9 of Happy Days premiered on October 6, 1981.

Season 10 of Happy Days premiered on September 28, 1982.

Season 11 of Happy Days premiered on September 27, 1983.