Halloween or Hallowe'en, also known as Allhalloween, All Hallows' Eve, or All Saints' Eve, is a yearly celebration observed in a number of countries on 31 October, the eve of the Western Christian feast of All Hallows' Day. It initiates the triduum of Allhallowtide, the time in the liturgical year dedicated to remembering the dead, including saints, martyrs, and all the faithful departed believers. Within Allhallowtide, the traditional focus of All Hallows' Eve revolves around the theme of using "humor and ridicule to confront the power of death." According to many scholars, All Hallows' Eve is a Christianized feast initially influenced by Celtic harvest festivals, with possible pagan roots, particularly the Gaelic Samhain. Other scholars maintain that it originated independently of Samhain and has solely Christian roots. Typical festive Halloween activities include trick-or-treating, attending costume parties, decorating, carving pumpkins into jack-o'-lanterns, lighting bonfires, apple bobbing, visiting haunted house attractions, playing pranks, telling scary stories and watching horror films.