National Day of Mourning Since 1970, Indigenous people & their allies have gathered at noon on Cole's Hill in Plymouth to commemorate a National Day of Mourning on the US Thanksgiving holiday. Many Native people do not celebrate the arrival of the Pilgrims & other European settlers. Thanksgiving Day is a reminder of the genocide of millions of Native people, the theft of Native lands and the erasure of Native cultures. Participants in National Day of Mourning honor Indigenous ancestors and Nativ