The Brazilian Carnival is one of the most impressive parties in the world. It is an annual festival in Brazil held four days before Ash Wednesday. On certain days of Lent, Roman Catholics and some other Christians traditionally abstained from the consumption of meat and poultry—hence the term "carnival," from carnelevare, "to remove (literally, "raise") meat."[1] Carnival celebrations are believed to have roots in the pagan festival of Saturnalia, which, adapted to Christianity, became a farewell to bad things in a season of religious discipline to practice repentance and prepare for Christ's death and resurrection.
Brazilian Carnival exhibits some differences from its European counterparts, having mixed African, Native, German and Euro elements. Furthermore, rhythm, participation, and costume vary from one region of Brazil to another. For example, in the southeastern cities of Rio de Janeiro and São Paulo, organized parades led by samba schools vie for prizes on the "sambodromo" open stage. Only samba-school affiliates participate in the shows. Smaller cities often have no public events but promote balls in recreational clubs.
The northeastern cities of Salvador, Porto Seguro and Recife have organized groups parading through streets, but watchers are also welcome to dance. They follow the "trio elétrico" floats through the city streets.
(Text adapted from Wikipedia)