International Workers' Day celebrates laborers and the working classes and occurs every year. It is promoted by the international labor movement, Socialists, and Communists. May Day is a national public holiday in many countries.
Joining street demonstrations and street marches
Legal holiday in:
Many countries around the world
Labor Day, May 1, May Day
May 1 was chosen to be International Workers' Day in order to commemorate the May 4, 1886 Haymarket affair in Chicago.