Which American TV sitcom was based around the lives of the Cunningham family?

"Happy Days" is an American television sitcom that aired first-run on the American Broadcasting Company (ABC) network from January 15, 1974, to July 19, 1984, with a total of 255 half-hour episodes spanning 11 seasons. Created by Garry Marshall, the series was one of the most successful of the 1970s, a sweet vision of life in the 1950s and early 1960s Midwestern United States, and starred Ron Howard as Richie Cunningham, Henry Winkler as his friend Fonzie, and Tom Bosley and Marion Ross as Richie's parents, Howard and Marion Cunningham.

Set in Milwaukee, Wisconsin during the 1950's, the series revolves around teenager Richie Cunningham and his family: his father, Howard, who owns a hardware store; traditional homemaker and mother, Marion; younger sister Joanie Cunningham; Richie's older brother Chuck (briefly in seasons 1 and 2 only); and high school dropout, greaser, and suave ladies' man Fonzie, who would eventually become Richie's best friend and the Cunninghams' over-the-garage tenant.