It is also possible that you are thinking of a different film altogether, such as:
* "The Happy Days of the '14's" (1925) - a silent film featuring stars like George O'Brien and Jean Arthur.
* "Happy Days" (1929) - a silent film with Nancy Carroll and Charles Rogers.
* "Happy Days - 1914" (1978) - A short film.
Please provide more information about the film you are looking for, including any other details you might remember, so I can help you find the correct information.