Réveillon is the French term for the New Year's Eve feast or festive supper.
In France and other French-speaking cultures, a réveillon is a long, celebratory meal associated especially with Christmas Eve or New Year’s Eve. The New Year’s version is often called Réveillon de la Saint-Sylvestre, referring to Saint Sylvester’s feast day on December 31.
A réveillon may include multiple courses, champagne, seafood, oysters, foie gras, desserts, and other regional or family specialties. Menus are not fixed, so the word describes the festive occasion and meal rather than one required dish. Restaurants and hotels may offer special réveillon menus.
The term is also used in Brazil, where Réveillon commonly refers to the broader New Year celebration, not merely a French-style supper. That shared word can cause confusion: in France it emphasizes the meal, while in Brazil it often names the entire public holiday event.