Halloween, or Hallowe’en (a contraction of All Hallows’ Evening), also known as Allhalloween, All Hallows’ Eve, or All Saints’ Eve, is a celebration observed in a number of countries on 31 October, the eve of the Western Christian feast of All Hallows’ Day.
t is a day to mark the single night in the year when, according to old Celtic beliefs, spirits and the dead can cross over into the world of the living. Some people hold parties and children may trick-or-treat in their neighborhood.