Twelve Hours of Happiness (French: Douze heures de bonheur) is a 1952 French romantic comedy drama film directed by Gilles Grangier and starring Dany Robin, Georges Marchal and Jean Tissier. The film's sets were designed by the art director Robert Clavel. It is also known by the alternative title Jupiter.
The daughter of a provincial pharmacist is due to marry her distant cousin Gilbert in an arranged marriage. However, she meets a stranger in the forest who has escaped from an asylum whom she dubs "Jupiter". He pretends to be her cousin and makes a good impression on the pharmacist. However complications ensue when the real cousin arrives.