Worker busy in his routine work in a factory as the world marks 1st May as International Workers’ Day also known as Labour Day and often referred to as May Day, is a celebration of labourers and the working classes that is promoted by the international labour movement. The date was chosen in 1889 for political reasons by the Marxist International Socialist Congress, which met in Paris and established the Second International as a successor to the earlier International Workingmen’s Association. They adopted a resolution for a “Great International Demonstration” in support of working-class demands for the eight-hour day. The date had been chosen by the American Federation of Labor to continue an earlier campaign for the eight-hour day in the United States, which had been the cause of a general strike beginning on 1 May 1886, and culminated in the Haymarket affair, which occurred in Chicago four days later. May Day subsequently became an annual event