In Hinduism, Holi marks the end of winter and celebrates the abundant colors of spring. In addition, it recalls key events in popular Hindu mythology. The principal narrative behind Holi is the Vaishnavite story of Hiranyakashipu, a demon king whose penance had made him almost invulnerable to death. This immunity led to excessive pride and the demand that people worship him rather than the gods. Hiranyakashipu’s own son, Prahlada, refused to cease his devotions to Vishnu so his father tried to kill him, but every method failed. Finally, Hiranyakashipu enlisted the help of his demon sister Holika, who was immune to death by fire. She carried Prahlada into the flames, but he prayed to Vishnu and survived, while Holika turned to ashes. This triumph of piety and goodness over pride and evil is celebrated during Holi. Although most Hindus celebrate the Festival for two days, Holi lasts for up to a week in some regions.