1976 | 5 Episodes

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

1974 | 16 Episodes

Season 1 of Happy Days premiered on January 14, 1974.

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

1974 | 23 Episodes

Season 2 of Happy Days premiered on September 9, 1974.

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

1975 | 23 Episodes

Season 3 of Happy Days premiered on September 8, 1975.

1976 | 24 Episodes

Season 4 of Happy Days premiered on September 20, 1976.

1977 | 26 Episodes

Season 5 of Happy Days premiered on September 12, 1977.

1978 | 27 Episodes

Season 6 of Happy Days premiered on September 11, 1978.

1979 | 25 Episodes

Season 7 of Happy Days premiered on September 10, 1979.

1980 | 22 Episodes

Season 8 of Happy Days premiered on November 10, 1980.

1981 | 22 Episodes

Season 9 of Happy Days premiered on October 5, 1981.

1982 | 22 Episodes

Season 10 of Happy Days premiered on September 27, 1982.

1983 | 22 Episodes

Season 11 of Happy Days premiered on September 26, 1983.