On 1 May, 1886, labour unions in the US decided to go on a strike demanding that workers should not be made to work for more than 8 hours a day. Just three days after the strike began, a blast occurred in Chicago’s Haymarket Square leaving many dead.

To honor those who died in the blast, the International Socialist Conference declared 1 May as a day designated for laborers.The commemorative day was established at a meeting in 1889 and gradually spread to other parts of the world.

In India, the first Labour Day was observed on 1 May, 1923, in present day Chennai. The day was celebrated by Labour Kisan Party of Hindustan.The red flag, which symbolizes Labour Day, was used for the first time in India. Prominent communist leader Malayapuram Singaravelu Chettiar raised the flag and arranged meetings to celebrate the occasion .Chettiar passed a resolution stating that the government should announce a national holiday on Labour Day in India and since then the country has continued to celebrate May Day.

In India, 1 May is also celebrated as Maharashtra Day and Gujarat Day. On this day in 1960, they attained statehood after Bombay (now Mumbai) was divided based on linguistic lines.

According to an article in Al Jazeera, International Workers’s Day has always been marked by celebrations, protests and strikes across the world. Some of the most well-known events of the day include the US civil disobedience acts against the Vietnam War in 1971.More recently in 2016, May Day saw a number of protests and marches around the world in places like Istanbul, Moscow and Taipei where workers either commemorated the holiday or called on governments to reduce working hours and increase wages.