Final answer:
Halloween is a holiday with roots in the ancient Celtic festival of Samhain. It's celebrated on October 31st and includes traditions like wearing costumes and carving pumpkins.
Step-by-step explanation:
Halloween is a holiday celebrated on October 31st that has its roots in the ancient Celtic festival of Samhain. Samhain marked the end of the harvest season and the beginning of winter, and it was believed that on this night, the boundary between the living and the dead was the thinnest. The ancient Celts would light bonfires and wear costumes to ward off spirits. This tradition evolved over time and came to include activities like trick-or-treating and carving pumpkins.
Learn more about Halloween history