Emancipation Day
Emancipation Day is a state-wide observation in Ohio on September 22.
Elsewhere on timeanddate.com
American Indian Heritage Day
American Indian Heritage Day is often observed on the Friday after Thanksgiving Day in the United States.
Native American Day
Native Americans' Day, on the second Monday of October, is celebrated some parts of the United States in lieu of Columbus Day.
Gold Star Mother's Day
Gold Star Mother’s Day is annually observed in the United States on the last Sunday of September.