Mardi Gras is the elaborate series of outdoor pageants and indoor tableau balls held annually during the winter social season in the United States, especially in New Orleans and Mobile. The carnival culminates on Fat or Shrove Tuesday, the day before Ash Wednesday, the first day of Lent. Rooted in European pre-Lenten revelries, the carnival tradition in the United States began in the colonial period and developed in tandem with racial policies and practices and survives as an extravagant spectacle of excess, decadence, and burlesque. The pageants, each sponsored by one of the many exclusive carnival organizations, are based upon themes drawn from mythology, history, or fiction and are often satiric of contemporary social issues.