Halloween is celebrated on October 31st. Children wear costumes and go trick-or-treating, knocking on doors and saying "trick or treat" to receive candy. Popular Halloween traditions and treats include costumes, scary movies, candy apples, candy corn, pumpkin seeds, parties where people tell scary stories and go apple bobbing, and carving or painting pumpkins. The document provides information about how Halloween is celebrated and traditions involving costumes, candy, and parties.