“Happy Days” premiered on Jan. 15, 1974 — and prime-time television was never the same. The ABC series, set in Eisenhower-era Milwaukee, materialized on the heels of the 1950s nostalgia ...

(Aaaay!) Credit...Doug Chayka Supported by By James Poniewozik Mention “Happy Days” to TV viewers of a certain age (raises hand) and the first thing they remember might be not an episode or a ...