History of an Eventful Myth: the 8-hour day (tags)
Since industrialization, it has been the norm for wage-earners of all ages, including children, to work 15 to 16 hours a day. There was no time for rest. An impoverishment of the working class was the result.
The History of May Day, Made in the USA (tags)
Leftist activists know about the eight men who were arrested and tried and convicted for terrorism related to Haymarket Square in Chicago. The bombing happened at a rally on the 4th, but it was due to events on May Day, when the city of Chicago went on strike.