: October 31 celebrated especially by wearing costumes and trick-or-treating
Word History of HALLOWEEN
In the Christian calendar the first day of November is All Saints' Day, which honors all the saints in heaven. The usual earlier name for this day in English was All Hallows Day or All Hallow Day, and the previous evening (October 31) was called All Hallows Eve or All Hallow Even. (The word hallow, related to holy, meant “saint.”) In Scotland All Hallow Even was contracted to Hallow-e’en, now spelled Halloween.