celebration in the international labour movement on May Day
May 1 is known in many countries as May Day or International Labor Day for human rights of workers. This day is a holiday in most countries, including UK,China, Cuba, Czech republic, France, Russia, Brazil, Austria, Germany, Serbia, Hungary, North Macedonia, Romania, Montenegro, Bosnia and Herzegovina, Kenya, Slovenia, Slovakia, Norway, Sweden, Turkey, Portugal, Bulgaria, Vietnam and Argentina.
May Day commemorates worker demonstrations for eight-hour workweeks in Chicago, May, 1886. More specifically, it commemorates the Haymarket Affair and the execution of multiple anarchist and marxist leaders.