Americans celebrate Thanksgiving on the fourth Thursday of November to give thanks for food and blessings. The tradition started in 1620 when Pilgrims from England traveled on the Mayflower to start a new life in North America. When they arrived, it was nearly winter so they faced a difficult first year with lack of food and many deaths. The following year, the Pilgrims had a successful harvest thanks to the help of Native Americans, and held a celebration which is now known as the first Thanksgiving.