Day before Ash Wednesday (the first day of Lent)
"Mardi Gras (Fat Tuesday in English) in New Orleans, Louisiana, is a Carnival celebration well-known throughout the world. The New Orleans Carnival season, with roots in preparing for the start of the Christian season of Lent, starts after Twelfth Night, on Epiphany (January 6). It is a season of parades, balls (some of them masquerade balls), and king cake parties."
