The document summarizes the history and traditions of Thanksgiving in the United States. It explains that the first Thanksgiving was celebrated in 1621 in Plymouth, Massachusetts between the Pilgrims and Native Americans after a successful harvest. It became a national holiday in 1863 by proclamation of President Lincoln. Typical Thanksgiving foods include turkey, mashed potatoes, stuffing, and cranberry sauce. Traditions involve children dressing as pilgrims and Native Americans and family gatherings for food.