Mardi Gras, festive day celebrated in France on Shrove Tuesday (the Tuesday before Ash Wednesday), which marks the close of the pre-Lenten season. The French name Mardi Gras means Fat Tuesday, from the custom of using all the fats in the home before Lent in preparation for fasting and abstinence. See Carnival.
In the United States the principal Carnival celebration is in New Orleans, Louisiana. The Carnival season there opens on Twelfth Night (also called Epiphany, which is observed on January 6) and climaxes with the Mardi Gras festivities commencing 10 days before Shrove Tuesday. This period is filled with citywide revelry and elaborate parades, both day and night, building up to Mardi Gras and the Rex parade. Beads of gold, green, and purple (representing power, faith, and justice, respectively) are commonly distributed, and the eating of king cake is an iconic part of the celebration.