A People's Calendar (aPC) is an open-source project that seeks to promote the worldwide history of working class movements and liberation struggles in the form of a searchable "On This Day" style calendar.
The Empire Zinc Strike, also known as the Salt of the Earth strike, was a 15-month-long miners' strike that began on this day in 1950, against the Empire Zinc Company in protest of its discriminatory pay and company housing practices.