International Workers' Day, also known as Workers' Day, Labour Day in some countries and often referred to as May Day, is a celebration of labourers and the working classes that is promoted by the international labour movement which occurs every year on May 1 an ancient European spring festival. The date was chosen by a pan-national organization of socialist and communist political parties to commemorate the Haymarket affair, which occurred in Chicago on 4 May 1886. Beginning in the 19th century ,the trade union and labour movements grew, a variety of days were chosen by trade unionists as a day to celebrate labour. In the United States and Canada, a September holiday, called Labour Day, was first proposed in the 1880s. Every country celebrate May day or Labour day according to their history and names. In India, Labour Day is a public holiday held on every 1 May. It is celebrated as Antarrashtriya Shramik Diwas . The holiday is tied to labour movements for communist and social...