Happy Days  è un telefilm per ragazzi e bambini, andato in negli usa per dieci anni dal 1974 al 1984. le storie sono ambientate  negli anni cinquanta e sesssanta a milwaukee e narra della vita della famiglia Cunningham. i personaggi principali sono Richard "Richie" Cunningham, Arthur "Fonzie" Fonzarelli, Warren "Potsie" Weber, Ralph Malph, Howard "Howie "Cunningham, Marion Cunningham, Joanie "Sottiletta" Cunningham, Alfred "Al" Delvecchio secondo proprietario di Arnold's.

Guarda il video della sigla del telefilm anni 80 Happy Days, e canta con il testo della canzone 

Sunday, Monday, Happy Days.
Tuesday, Wednesday, Happy Days.
Thursday, Friday, Happy Days.
The weekend comes,
My cycle hums,
Ready to race to you. 
These days are all,
Happy and Free. (Those Happy Days)
These days are all,
Share them with me. (oh baby)
Goodbye grey sky, hello blue.
There's nothing can hold me when I hold you.
Feels so right, it can't be wrong.
Rockin' and rollin' all week long. 
Sunday, Monday, Happy Days.
Tuesday, Wednesday, Happy Days.
Thursday, Friday, Happy Days.
Saturday, What a day,
Groovin' all week with you. 
These days are all,
Share them with me. (Those Happy Days)
These days are all,
Happy and Free. (oh baby)
These Happy Days are your's and mine.
These Happy Days are your's and mine, Happy Days.