Carnival in Rio.
Carnival is Rio's main event. It happens at the peak of summer, when Cariocas are at their best. Festivities attract thousands of people from all corners of the world. Carnaval, as spelled in Portuguese, is a 4-day celebration. It starts on Saturday, and ends on Fat Tuesday, or Mardi-Gras. Dates change every year. Carnival Sunday is seven weeks before Easter Sunday.