Labourers busy working at a brick kiln in Ranchi on May 1, 2020.

Ranchi: Labourers busy working at a brick kiln in Ranchi on May 1, 2020. International Workers’ Day also known as Labour Day or May Day is observed each year on the first day of May to celebrate achievements of the working class, commemorating the historic struggles and gains made by workers and the labour movement. May(Photo: IANS)