What is the French name for New Year's Eve, used in celebrations such as Paris's Réveillon?

The French name for New Year's Eve is Saint-Sylvestre.

Saint-Sylvestre refers to December 31, the feast day of Saint Sylvester I in the Catholic liturgical calendar. In French-speaking contexts, the evening is also commonly called le réveillon de la Saint-Sylvestre, referring to the celebratory meal or gathering held that night. The term therefore combines a calendar date, a saint's name, and a social celebration.

French New Year's customs vary by household and region. People may share a special meal, raise a toast, exchange good wishes, and attend public events. Paris celebrations can include gatherings around the Champs-Élysées or views of illuminated landmarks, although official programming changes from year to year.

Saint-Sylvestre should not be confused with Réveillon as a general word for a festive late-night meal. In French usage, réveillon can also refer to the Christmas Eve meal, while Saint-Sylvestre identifies the New Year's Eve occasion specifically.