Thanksgiving is a holiday celebrated in the U.S. on the fourth Thursday of November every year. It has a rich history, dating back to the Pilgrims' first harvest celebration in 1621. The holiday has evolved over time and is now celebrated with a traditional meal, parades, and football games. Let's take a visual journey through the history of Thanksgiving. These images offer a unique glimpse into the customs, traditions, and symbols associated with the holiday throughout the centuries.