This section from the U.S. strike in Chicago. May 1, 1886, Chicago, more than 20 million workers to fight for the implementation of an eight-hour working day strike held, after a bloody hard struggle, finally won victory. To commemorate the labor movement, July 14, 1889, convened by the Inter-Marxist socialists Congress opened in Paris, France. The General Assembly, the delegates agreed that: to May 1st as the international proletariat, the common festival. This resolution received a positive response from workers in countries around the world.
May 1, 1890, Western nations take the lead in the working class took to the streets, held a grand demonstration and assembly, to gain their legitimate rights and interests. From then on, every day working people around the world have to assembly, of procession and celebration.
Chinese people celebrate the Labor Day activities can be traced back to 1918. That year, a number of revolutionary intellectuals in Shanghai, Suzhou and other places distributed to the masses introduced the "51" leaflets. May 1, 1920, Beijing, Shanghai, Guangzhou and other cities, the masses of workers took to the streets in massive demonstrations, rallies. After the founding of New China, China in December 1949 the "51" as a statutory Labor Day.
This is the "51" International Day of the origin.
“五一”国际劳动节简称五一节，在每年的５月１日。它是全世界劳动人民的共同节日。关于“五一节的由来”是这样的：
此节源于美国芝加哥的工人大罢工。１８８６年５月１日，芝加哥的２０ 多万工人为争取实行八小时工作制而举行大罢工，经过艰苦的流血斗争，终于获得了胜利。为纪念这次工人运动，１８８９年７月１４日，由各国马克思主义者召集的社会主义者代表大会，在法国巴黎隆重开幕。大会上，与会代表一致同意：把５月１日定为国际无产阶级的共同节日。这一决议得到世界各国工人的积极响应。
１８９０年５月１日，欧美各国的工人阶级率先走上街头，举行盛大的示威游行与集会，争取合法权益。从此，每逢这一天世界各国的劳动人民都要集会、游行，以示庆祝。
中国人民庆祝劳动节的活动可追溯至１９１８年。这年，一些革命的知识分子在上海、苏州等地向群众散发介绍“五一”的传单。１９２０年５月１日，北京、上海、广州等城市的工人群众走上街头举行了声势浩大的游行、集会。新中国成立后，我国于１９４９年１２月将“五一”定为法定的劳动节。
这就是“五一”国际劳动节的由来。