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It is widely believed that many Halloween traditions originated from Celtic harvest festivals that may have pagan roots, particularly the Gaelic festival Samhain, and that this festival was Christianized as Halloween.
Halloween activities include trick-or-treating (or the related guising), attending Halloween costume parties, carving pumpkins into jack-o’-lanterns, lighting bonfires, apple bobbing, divination games, playing pranks, visiting haunted attractions, telling scary stories and watching horror films.
