May Day

May Day, also known as Workers' Day or International Workers' Day, is a public holiday in many countries. May Day is observed on May 1 in most countries, however, some countries celebrate May Day on a different date.

May Day is to commemorate the Haymarket affair in Chicago. A strike promoting an eight-hour working day took place at Haymarket Square in Chicago from May 1 to 4, 1886. It was a peaceful rally at the beginning, however, on May 4, 1886, a bomb was exploded near Haymarket Square when police arrived to break up the rally. Many police officers and protesters were killed by the blast.

The Haymarket Affair is usually considered as the origin of the International Workers' Day, and the following is the list of May Day from 2022 to 2026.