An annual protest organized originally in 1970 by Native Americans of New England call Thanksgiving day what?

The annual protest called Thanksgiving Day the National Day of Mourning. It was first held in 1970 by Native American activists and supporters in Plymouth, Massachusetts, challenging celebratory narratives about the holiday and highlighting the historical suffering and continuing struggles of Indigenous peoples.

The event began after Wamsutta Frank James, a Wampanoag leader, was invited to speak at a 350th-anniversary Thanksgiving observance but was not allowed to deliver his prepared remarks. Instead, he and other organizers gathered on Cole’s Hill, near Plymouth Rock, on November 26, 1970.

Organized by the United American Indians of New England, the National Day of Mourning has continued annually on Thanksgiving. Participants use the day for remembrance, protest, education, and solidarity. It is distinct from “Unthanksgiving Day,” an Indigenous observance associated with Alcatraz Island, although both events question conventional accounts of colonial history.