The holiday of Mardi Gras is celebrated in all of 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).
The earliest-established krewes were the Mistick Krewe of Comus, the earliest, Rex, the Knights of Momus and the Krewe of Proteus.
Several modern “super krewes” are well known for holding large parades and events, such as the Krewe of Endymion (which is best known for naming celebrities as grand marshals for their parades), the Krewe of Bacchus (similarly known for naming celebrities as their Kings), as well as the Zulu Social Aid & Pleasure Club.
The Midnight Ride w/ David Carrico and Jon Pounders on NYSTV