At least one person mentioned International Workers Day. There is actually a lot more to the strike OP mentioned: "Massive rioting swept Cleveland, Ohio on May Day 1894 in protest against unemployment stemming from the economic crisis of the previous year. The Pullman Strike began a few days later, on May 11, culminating with countrywide disruptions and the murders of many workers by police and other mercenaries. In response, President Grover Cleveland announced that Labor Day in September would become a national holiday, attempting to coopt workers’ struggles without affirming the anniversary of the Haymarket incident. Samuel Gompers, a founder of the AFL and a virulent opponent of immigration, anarchism, socialism, and, later, the Industrial Workers of the World, supported the federal government in crushing the Pullman Strike and backed Grover Cleveland’s effort to undermine the momentum of May Day. Make no mistake: the official leadership of legalized labor organizations has largely aimed to tame and hobble them from the very beginning." - The May Days: Stories of Courage and Resistance You see, May Day has been celebrated world wide for thousands of years, as Beltane: "At base, May Day isn’t about labor: it’s about abundance. It’s about excess, pleasure, freedom—the burgeoning source of life itself. As a millennia-old holy day honoring the return of spring, May Day directs our thoughts to nature—a wild and beautiful chaos that flows through us and nourishes us, which we can enjoy but never control. Our joyous acts of rebellion do not point to a world in which workers are paid a little better for their labor, but to the possibility that we could sweep away all the forms of oppression that stand between us and the tremendous potential of our lives." But then adopted as International Workers Day after the Haymarket Massacre. "This short essay chronicles the two sides of May Day the red and the green. From the May pole to the haymarket martyrs get exited for an awesome May Day and listen to this Audiozine. "The repression had begun with the burning of women and it continued in the 16th century when America was "discovered," the slave trade was begun, and nation-states and capitalism were formed. In 1550 an Act of Parliament demanded that Maypoles be destroyed, and it outlawed games. In 1644 the Puritans in England abolished May Day altogether.""