Final answer:
Halloween comes from an ancient Celtic festival known as Samhain, marking the end of the harvest season and the start of winter.
Step-by-step explanation:
Halloween comes from an ancient Celtic festival known as Samhain. Samhain marked the end of the harvest season and the beginning of winter. During this festival, the Celts believed that the boundary between the living and the dead was blurred, and they would light bonfires and wear costumes to ward off ghosts.
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