The word Halloween or Hallowe'en dates to about 1745 and is of Christian origin. The word "Halloween" means "hallowed evening" or "holy evening".
Halloween or Hallowe'en, contraction of "All Hallows' Evening"), also known as All Hallows' Eve, is a yearly celebration on October 31,the eve of the Western Christian feast of All Hallows (or All Saints) and the day initiating the triduum of Hallowmas, the time in the liturgical year dedicated to remembering the dead, including saints (hallows), martyrs, and all the faithful departed believers.