Final answer:
The first Thanksgiving celebration took place in September or October, 1621. The Pilgrims and Indians gathered for a feast that lasted for three days.
Step-by-step explanation:
The first Thanksgiving celebration took place in September or October, 1621. The Pilgrims had killed a large number of ducks and geese, and Massasoit arrived with about one hundred Indians who later killed five deer to add to the feast. The participants ate with their fingers and sprawled on the ground as they consumed the feast. The celebration lasted for three days.