May Day, (May 1st) also called International Workers’ Day, day commemorating the historic struggles of labours and the workers movement and it is observed in many countries on May 1. In the USA and Canada the similar day is celebrating on September 1st known as Labor Day.
Europe :
In Europe May 1 was historically associated with rural pagan festivals, but the original meaning of the day was gradually replaced by the modern association with the labour movement. In Rusia leaders embraced the new holiday, believing it would encourage workers in Europe and the United States to unite against Capitalism. The day became a significant holiday in Russia and old Soviet Union countries and in the Eastern-bloc countries, with high-profile parades, including one in Moscow’s Red Square presided over by top government and Communist Party functionaries, celebrating the worker and showcasing Soviet military might. In Germany Labour Day became an official holiday in 1933 after the rise of the Nazzi Party.
United States and Canada
Monday of September is the official labour day in U.S. and Canada to the honor of workers
