Réveillon is the name commonly used for Rio de Janeiro's famous New Year's Eve celebration over Copacabana Beach.
The Portuguese term refers to New Year's Eve festivities more broadly, but Rio's Réveillon is especially known for its huge beach gathering, concerts, fireworks, and tradition of wearing white. The celebration takes place on December 31 and continues into the first hours of January 1.
Fireworks are launched from barges offshore, allowing the display to be viewed along the broad curve of Copacabana Beach. Large crowds gather in a setting shaped by Brazilian music, religious symbolism, tourism, and the city's beach culture.
Réveillon is not the same event as Rio Carnival, which occurs later and is associated with samba schools and pre-Lenten festivities. Some attendees also make offerings or rituals connected with Afro-Brazilian religious traditions, though practices vary.