The history of Labour Day on May 1st traces back to the late 19th century and is closely tied to the labor movement and workers' rights advocacy. The origins of International Workers' Day, as it's also known, can be found in the struggle for an eight-hour workday. One significant event in this history is the Haymarket affair, which occurred in Chicago, USA, in May 1886. On May 1st, labor activists organized a general strike to demand an eight-hour workday. The protests culminated in a violent confrontation between police and protesters on May 4th at Haymarket Square, where a bomb was detonated, leading to casualties on both sides. The incident led to the trial and execution of several labor activists, though their guilt was highly disputed. In 1889, the International Socialist Conference declared May 1st as International Workers' Day in commemoration of the Haymarket affair and as a day to honor workers' rights worldwide. Since then, May 1st has been observed as a day of demonstrations, protests, and celebrations by labor unions and workers' organizations across many countries. The significance of May 1st as Labour Day varies from country to country, but it generally serves as a reminder of the struggles and achievements of the labor movement, as well as an opportunity to advocate for workers' rights, fair wages, and better working conditions.