
International Workers' Day (also known as May Day) is a celebration of the international labour movement. May 1 is a national holiday in more than 80 countries and celebrated unofficially in many other countries.
The first May Day celebration in India was organised in Madras by the Labour Kisan Party of Hindustan on 1 May 1923.[23] This was also the first time the red flag was used in India.[24]...