By the beginning of the 17th century, the Pilgrims used to celebrate Thanksgiving after their harvests in the New World. At that time, the celebration took three days of praying as a way of thanking God.
The "First Thanksgiving" was celebrated in October 1621 when the Pilgrims got their first harvest in their new lands in America. Not only the Pilgrims but also the Native Americans attended the festival.
From 1789 Thanksgiving has been celebrated intermittently in the US until President A. Lincoln declared "Thanksgiving" a national holiday which would take place on the fourth Thursday of November.
