INDIAN HISTORY

Detailed explanation-1: -In 1889, May 1 was designated May Day, a day in support of workers, by an international federation of socialist groups and trade unions in commemoration of the Haymarket Affair, a violent confrontation that took place on May 4, 1886, in Chicago, Illinois.

Detailed explanation-2: -The holiday known as Labour Day (which has the same origins) is observed in many places around the world, though often on a different date. It is sometimes called International Workers’ Day or simply Workers’ Day.