May 1 international labor day or May Day, May 1 in every year. It is the world labor people's common festival. About the origin of the "May Day" goes like this:

This section is the result of Chicago workers strike. On May 1, 1886, Chicago, more than 20 workers strike in the struggle for shall institute an eight-hour working day system, after a bloody hard struggle, finally won. In honor of the workers' movement, on July 14, 1889, by the marxist socialist congress convened, the grand opening in Paris, France. Meeting, delegates agreed: on May 1st as the international proletariat holiday together. The resolution to get positive response of the workers around the world. On May 1, 1890, the working class of euro-american took to the streets, held a grand demonstrations and rallies, strive for the legitimate rights and interests. From then on, whenever that day working people around the world have to assembly, a procession, to celebrate.

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The Chinese people celebrate the labor day activities can be traced back to 1918. Is year, some knowledge members of revolution in Shanghai, suzhou and other places to introduce common people "51" flyers. On May 1, 1920, Beijing, Shanghai, guangzhou and other cities of the workers took to the streets held a huge marches and rallies. After the founding of new China, China in December of 1949 will "51" as the legal labor day.

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。是年，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， 国于1949 年12月将“五一”定为法定的劳动节。