Halloween Halloween Halloween or Hallowe'en (a contraction of Hallows' Even or Hallows' Evening), also known as Allhalloween, All Hallows' Eve, or All Saints' Eve, is a celebration observed in several countries on 31 October, the eve of the Western Christian feast of All Hallows' Day. It begins the three-day observance of Allhallowtide, the time in the liturgical year dedicated to remembering the dead, including saints (hallows), martyrs, and all the faithful departed. It is widely believed that many Halloween traditions originated from ancient Celtic harvest festivals, particularly the Gaelic festival Samhain; that such festivals may have had pagan roots; and that
Veneration of the dead are remembered. On that day, families go to cemeteries to light candles for their dead relatives, leave them flowers, and often to picnic. The evening before All Saints'—"All Hallows Eve" or "Hallowe'en"—is unofficially the Catholic day to remember the realities of Hell, to mourn the souls lost to evil, and to remember ways to avoid Hell . It is commonly celebrated in the United States and parts of the United Kingdom in a spirit of light-hearted horror and fear, which is marked by the recounting of ghost stories, bonfires, wearing costumes, carving jack-o'-lanterns, and "trick-or-treating" (going door to door and