A final, more "contemporary" version of the theme was introduced for the show's farewell season. The Songwriters and Singers
As the show shifted to a live studio audience and focused more on Henry Winkler's Fonzie character, producers replaced the opening with the now-iconic "Happy Days" theme. happy_days_theme_song
The version by the duo Pratt & McClain was a massive success beyond the television screen. Released as a single in 1976, it climbed to . Interestingly, the song was not originally intended to be a radio single; it was recorded quickly—from the first meeting to a finished record in just seven days—to meet audience demand after the show became a hit. A final, more "contemporary" version of the theme