May Day is a public holiday. It is an ancient northern hemisphere spring festival, and a traditional spring holiday in many cultures. It is celebrated as Antarrashtriya Sharmik Diwas (International Worker’s Day). The holiday is tied to labour movements for communist and socialist political parties.
Labour Day (Labor Day in the United States) is an annual holiday to celebrate the achievements of workers. Labour Day has its origins in the labour union movement, specifically the eight-hour day movement, which advocated eight hours for work, eight hours for recreation, and eight hours for rest.
For most countries, Labour Day is synonymous with, or linked with, International Workers’ Day, which occurs on 1 May. For other countries, Labour Day is celebrated on a different date, often one with special significance for the labour movement in that country. Labour Day is a public holiday in many countries.