The Brazilian New Year's Eve event famous for white clothing and jumping seven waves is Réveillon.
Réveillon is the Portuguese term widely used in Brazil for New Year's Eve celebrations. Along Brazil's coast, festivities often combine beach gatherings, concerts, fireworks, and offerings or rituals influenced by Afro-Brazilian religious traditions. Wearing white is commonly associated with peace and renewal.
A popular practice is to jump seven waves, making a wish with each jump. The number seven has spiritual significance in the tradition, and the ritual is especially visible at beach celebrations. Customs vary by region and by family, so not every Réveillon participant follows the same practices.
Réveillon is a broad celebration rather than the name of one particular beach or city event. Rio de Janeiro's Copacabana gathering is one of its best-known examples, but major celebrations take place in many Brazilian cities.