May Day is a celebration of the international labour movement and left-wing movements. It commonly sees organized street demonstrations and marches by working people and their labour unions throughout most of the world. May 1 is a national holiday in more than 80 countries. It is also celebrated unofficially in many other countries.
May 1st, International Workers' Day, commemorates the historic struggle of working people throughout the world, and is recognized in every country except the United States, Canada, and South Africa. This despite the fact that the holiday began in the 1880s in the United States, with the fight for an eight-hour work day.