Thanksgiving is celebrated annually on the fourth Thursday of November in the United States. It commemorates the 1621 harvest feast shared by the Pilgrims and Wampanoag people after experiencing a difficult first winter in Plymouth. The Pilgrims had fled religious persecution in England and sought freedom and prosperity in the New World. The three-day celebration involving the Pilgrims and Native Americans included activities like games and a feast featuring foods such as turkey, pumpkin, and squash. Abraham Lincoln declared Thanksgiving a national holiday in 1863.