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.
1974 | 23 Episodes
Season 2 of Happy Days premiered on September 9, 1974.
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.
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