What is the name of France's New Year's Eve celebration or feast, held on December 31?

France's New Year's Eve celebration or feast, held on December 31, is called Réveillon de la Saint-Sylvestre.

The name refers to Saint Sylvester's Day, which falls on December 31 in the Western Christian calendar. A réveillon is a late, festive meal or celebration, and the Saint Sylvestre réveillon traditionally brings together family or friends for food, drinks, and the transition into the new year.

French celebrations vary by household and region. Champagne, oysters, foie gras, smoked salmon, and elaborate desserts are commonly associated with festive menus, though no single menu is mandatory. Paris may also host public gatherings and displays, but private dinners remain important.

The term is sometimes shortened to Saint-Sylvestre or simply réveillon. It should not be confused with Bastille Day, France's national day on July 14.