Happy Days TV Show design. Happy Days Sit On It! is 100% authentic, officially licensed Happy Days merchandise! Happy Days is an American sitcom television series that showcases a sweet vision of life in the 1950s and early 1960s in the Midwestern United States. It stars Ron Howard as Richie Cunningham, and Henry Winkler as his friend, Fonzie. Lightweight, Classic fit, Double-needle sleeve and bottom hem