U.S. tradition compares Thanksgiving the holiday with a meal held in 1621 by the Wampanoag and the Pilgrims who settled in Plymouth, Massachusetts. It is continued in modern times with the Thanksgiving dinner, traditionally featuring turkey, playing a large role in the celebration of Thanksgiving.
"Unthanksgiving Day (or Un-Thanksgiving Day) is an event on the Island of Alcatraz in the San Francisco Bay, in the United States of America, which honors the memories of the indigenous peoples of the Americas and promotes their rights."
"On 20 November 1969, a number of Native Americans occupied the island of Alcatraz (estimated at 3,000), which came to be known as the Occupation of Alcatraz. The occupation lasted 19 months. During this time hundreds of Native Americans came to join the movement, recognizing the importance of speaking out for their rights."
"Every year on the U.S. Thanksgiving holiday, several thousand indigenous peoples, the ancestors of indigenous peoples, and spectators travel to the island where several groups dance before sunrise, honoring their ancestors, demonstrating the beauty of their culture, and speaking out for the rights of their people, and against the genocide committed against them by the European colonialists. The celebration also attracts other groups fighting for the rights of indigenous people and peace activists."