In keeping with traditions that date back to the 19th century, Super Sunday is the Sunday closest to St. Joseph's Day (March 19). During their processions, the participating Mardi Gras Indian tribes, led by their Big Chiefs, often meet other tribes (or" gangs") and their Big Chiefs, performing colorful dances, chants and other rituals. Each tribe and their Big Chief tries to outdo the other in a friendly competition witnessed by appreciative spectators.