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1. Halloween is one of the most popular days in the year in Canada and the United States. 2. Some people dress up to look like an animal, a person from a book or a movie, or a famous person from history on Halloween. 3. Yes, children in some places in Canada and the United States wear their Halloween costumes when they go to school on Halloween. 4. Many young children put on their costumes and visit their neighbors, knocking on doors and saying "Trick or treat!" to receive candy or chocolate. 5. Usually, there are Halloween parties in the evening and there is often a prize for the best or most unusual costume.