Thanksgiving Day is a national holiday celebrated primarily in the United States and Canada. It is observed on the fourth Thursday of November in the U.S. and on the second Monday of October in Canada. The holiday originated as a harvest festival, where people gave thanks for a bountiful harvest and shared food with family and friends. Traditionally, Thanksgiving meals include dishes such as roast turkey, stuffing, mashed potatoes, and pumpkin pie. Many families also participate in activities like watching football games or volunteering to help those in need. The day emphasizes gratitude, togetherness, and reflection on the past year.