The passage provides details about the history and traditions of Thanksgiving in the United States. It explains that the first Thanksgiving occurred in 1621 when the Pilgrims invited the Wampanoag Native Americans to a three-day feast to celebrate the autumn harvest after surviving their first year in America. Today, Thanksgiving is celebrated with families gathering to eat turkey and express gratitude, and is also marked by parades like the Macy's parade in New York City and football games on television. The traditional Thanksgiving meal includes turkey, stuffing, mashed potatoes, cranberry sauce, vegetables and pumpkin pie.