Have you ever heard of Carnival? It's basically mardi gras times a million. Wikipedia says that Carnival is "a festive season which occurs immediately before Lent; the main events are usually during February. Carnival typically involves a public celebration or paradecombining some elements of a circus, mask and public street party. People often dress up or masquerade during the celebrations, which mark an overturning of daily life."
I'm going to show you some pictures from some of the biggest Carnivals in the world...first off is Brazil!