Labour law governs the legal rights of workers and their organizations. It addresses issues like the right to organize unions, protections from discrimination, wages and hours, and health and safety. Labour law has evolved from the industrial revolutions of the 18th century onward. Early landmarks included laws protecting child labourers in the early 19th century. The International Labour Organization was formed in 1919 to promote social justice and workers' rights globally. It establishes labour standards and conventions. May 1st became an international workers' day to commemorate the fight for an eight hour workday.