The terms "Mardi Gras" (also known as "Mardi Gras season" or "Carnival season") refer to events of the Carnival celebrations, beginning on or after Epiphany and ending on the day before Ash Wednesday. Mardi Gras is French for "Fat Tuesday" (in ethnic English tradition, Shrove Tuesday), referring to the practice of the last night of eating richer, fatty foods before the ritual fasting of the Lenten season, which started on Ash Wednesday. Related popular practices were associated with celebrations before the fasting and religious obligations associated with the penitential season of Lent. Popular practices included wearing masks and costumes, overturning social conventions, dancing, sports competitions, parades, etc. Similar expressions to Mardi Gras appear in other European languages sharing the Christian tradition. In English, the day is called Shrove Tuesday, associated with the religious requirement for confession before Lent begins.
In 1723, the capital of Louisiana was moved to New Orleans, founded in 1718. The tradition has expanded to the point that it became strongly associated with the city in popular perception, and embraced by residents of New Orleans beyond those of French or Catholic heritage. Mardi Gras celebrations are part of the basis of the slogan, Laissez les bons temps rouler, (Let the good times roll) and the nickname "Big Easy".