National Day Of Mourning Plymouth 2025. • the national day of mourning began in 1970 and is held annually in plymouth, massachusetts. (tnd) — activists are planning their annual “national day of mourning” demonstration to be held at massachusetts's plymouth rock historic site honoring.

The national day of mourning is observed yearly on the same day as. Since 1970, indigenous people and their allies have gathered at noon on cole’s hill in plymouth to commemorate a national day of mourning on the u.s.