National Day of Mourning

Since 1970, Native Americans and our supporters have gathered at noon on Cole’s Hill in Plymouth to commemorate a National Day of Mourning on the United States Thanksgiving holiday. Many Native Americans do not celebrate the arrival of the Pilgrims and other European settlers. Thanksgiving Day is a reminder of the genocide of millions of Native people, the theft of Native lands, and the relentless assault on Native culture. Participants in National Day of Mourning honor Native ancestors and the struggles of Native peoples to survive today. It is a day of remembrance and spiritual connection as well as a protest of the racism and oppression which Native Americans continue to experience.
http://www.uaine.org

The organizers of this observance consider Thanksgiving Day as a continued reminder of the democide and suffering of Native American people. Since 1970, participants in the National Day of Mourning have honored Native ancestors and their struggles to survive today. Part of the mission behind the event is to educate Americans about the history of Thanksgiving.
Organized by United American Indians of New England (UAINE) during a period of Native American activism, the march has brought about revisions in the depiction of United States history and government and settler relationships with Native American peoples as well as a renewed appreciation for their culture.
https://nationaldaycalendar.com/national-day-of-mourning-fourth-thursday-in-november