The Margaret landed her passengers at Berkeley Hundred on December 4, 1619. The settlers did indeed celebrate a day of "Thanksgiving", establishing the tradition two years and 17 days before the Pilgrims arrived aboard the Mayflower at Plymouth, Massachusetts to establish their Thanksgiving Day in 1621.
The Margaret brought its passengers to Berkeley Hundred on December 4, 1619, marking an early instance of gratitude. This event preceded the Pilgrims' arrival aboard the Mayflower at Plymouth, Massachusetts two years and 17 days later, where they would establish their own Thanksgiving celebration in 1621.