The holiday of Mardi Gras is celebrated in Southern Louisiana, including the city of New Orleans. Celebrations are concentrated for about two weeks before and through Shrove Tuesday, the day before Ash Wednesday (the start of lent in the Western Christian tradition). Usually there is one major parade each day (weather permitting); many days have several large parades.
The earliest reference to Mardi Gras "Carnival" appears in a 1781 report to the Spanish colonial governing body. That year, the Perseverance Benevolent & Mutual Aid Association was the first of hundreds of clubs and carnival organizations formed in New Orleans.
The largest and most elaborate parades take place the last five days of the Mardi Gras season. In the final week, many events occur throughout New Orleans and surrounding communities, including parades and balls (some of them masquerade balls).