Excellent message from ‘Got Questions’
The original thanksgiving celebration was held by the Pilgrim settlers in Massachusetts during their second winter in America in December, 1621. The first winter had killed 44 of the original 102 colonists. At one point their daily food ration was down to five kernels of corn apiece, but then an unexpected trading vessel arrived, swapping them beaver pelts for grain, providing for their severe need. The next summer’s crop brought hope, and Governor William Bradford decreed that December 13, 1621, be set aside as a day of feasting and prayer to show the gratitude of the colonists that they were still alive. More Here