Which American holiday is described in Plymouth plantation with the Squanto people?

The American holiday described in Plymouth Plantation with the Squanto people is Thanksgiving. This holiday commemorates the Pilgrims' harvest feast in 1621, which they shared with the Wampanoag people, including Squanto, who played a crucial role in helping the settlers survive. The event symbolizes cooperation and gratitude between the two groups. Thanksgiving is now celebrated annually in the United States on the fourth Thursday of November.