Brazil's New Year's Eve celebration is called Réveillon.
The term comes from French réveillon, a word for a late-night celebratory meal or gathering. In Brazil, it commonly refers to the nationwide New Year festivities, especially the huge beach celebration in Rio de Janeiro. The spelling and pronunciation have become established in Brazilian Portuguese even though the word originated in French.
Brazilian Réveillon customs vary, but parties often feature special meals, music, fireworks, and gatherings that continue through the night. Wearing white is particularly common, reflecting associations with peace and fresh beginnings. Some celebrants also make offerings to Iemanjá, the sea deity honored in Afro-Brazilian religious traditions.
The word is sometimes confused with Carnaval because both involve large public celebrations and music. They are separate events: Réveillon marks the transition from December 31 to January 1, while Carnaval is held later and follows a different religious and cultural calendar.