Falls the day before Ash Wednesday and marks the end of the carnival season, which once began on Epiphany but is now usually celebrated the last three days before Lent. In France, the day is known as Mardi Gras (Fat Tuesday), and celebrations are held in several American cities, particularly New Orleans. The day is sometimes called Pancake Tuesday by the English because fats, which were prohibited during Lent, had to be used up.