June 3, 1900 - The International Ladies’ Garment Workers Union (ILGWU) was founded. (From Workday Minnesota)
June 3, 1901 – Carpenters struck for higher wages & union recognition in Ottawa, Canada. (From the Daily Bleed)
June 3, 1910—The Francisco Ferrer Association was founded in Harlem, by supporters of the educator who had been executed by the Spanish government the year before. The organization’s goals included founding libertarian schools throughout the U.S. based on the principals of Francisco Ferrer.
June 3, 1918 - A federal child labor law that had been enacted in 1916 was declared unconstitutional. A new version was enacted on February 24, 1919, but was also later declared unconstitutional. It was not until the 1930s that child labor provisions were enacted as part of sweeping labor law reforms, though exploitation of children continues to be a problem in the United States today). (From Workday Minnesota)