Boisterous crowds of workers, immigrants and union members celebrated International Workers Day on May 1 with a march from the Saint Paul Cathedral to the Minnesota State Capitol. In the United States, International Workers’ Day commemorates the 1886 Haymarket Massacre in Chicago. After someone threw a dynamite bomb at police as they dispersed a public meeting, Chicago police fired on workers during a general strike for the eight-hour workday, killing several demonstrators and resulting in the deaths of several police officers — mostly from friendly fire. That strike culminated in the eight-hour workday.
This day is celebrated in about 100 countries around the world, some as Workers day, others as May Day. In 1955 the Roman Catholic Church dedicated May 1 to, “St. Joseph The Worker.” Right-wing governments have often tried to suppress the message of International Workers Day. May Day origins.