Happy Days was originally the melody that accompanied the credits of the TV show of the same name during its first few seasons. They both became so popular that the song eventually became the show’s main theme in the 1970s and 80s. Happy Days is an upbeat song that people can’t help but tap their feet to whenever they hear it. It even reached the top five on the American charts. No one will be able to sit still when your band strikes up this tune!