Final answer:
The first Thanksgiving is believed to have been celebrated in November by the Pilgrims and the Wampanoag tribe in 1621.
Step-by-step explanation:
The first Thanksgiving is believed to have been celebrated in November. It is commonly associated with the Pilgrims and the Wampanoag tribe who gathered for a harvest feast in 1621 in Plymouth, Massachusetts. While there were earlier instances of European settlers celebrating Thanksgiving-like events, the 1621 gathering is considered the most significant and is often referred to as the first Thanksgiving.
Learn more about The First Thanksgiving