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:

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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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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。