The name Hallowe'en comes from All Hallows' Eve, and is always celebrated on October 31st, the day before All Hallows' Day when the dead are remembered. It may have come originally from Gaelic traditions, but it has become commercialised over much of the world. The old Scottish custom of guizing - children knocking on doors in fancy dress, telling jokes or singing songs in return for apples, fruit or sweeties - evolved into the American trick or treat activities.
