On May 1, 1916, miners in the Coal Region earned the 8 hour workday, successfully ending decades of advocacy and protest.
May Day 1916 – When anthracite mineworkers earned the 8 hour workday

On May 1, 1916, miners in the Coal Region earned the 8 hour workday, successfully ending decades of advocacy and protest.
Coal miners across Pennsylvania went on strike in 1902. They couldn't have succeeded without the ladies.