Thanksgiving is an annual national holiday in the US celebrated on the fourth Thursday of November. It commemorates a harvest festival celebrated by the Pilgrims in 1621. Most Americans join their families for a traditional meal that often includes turkey. The day after Thanksgiving kicks off the Christmas holiday shopping season. Fun facts about turkeys include that the average American eats 16-18 pounds of turkey at Thanksgiving and Californians consume the most turkey. Over 280 million turkeys are sold for Thanksgiving celebrations in the US each year.