国际劳动节又称“五一国际劳动节”、“国际示威游行日”，是世界上大多数国家的劳动节。定在每年的五月一日。它是全世界无产阶级、劳动人民的共同拥有的节日。

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International Labor Day is also called "the five one international Labour Day", "International Day", is the world's labor day in most countries. On May 1st of each year. It is the world proletariat, the working people have holiday.

五一国际劳动节源于美国芝加哥城的工人大罢工。1886年5月1日，芝加哥的二十一万六千余名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。为纪念这次伟大的工人运动，1889年7月第二国际宣布将每年的五月一日定为国际劳动节。这一决定立即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向街头，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。中国心!

The workers International Workers'Day source in Chicago city USA strike. In May 1, 1886, Chicago of 20 workers for the implementation of the eight hour working day strike held, after a bloody struggle, finally achieved victory. To commemorate the great labor movement, in 1889 July Second International declared May 1st each year as the international labor day. This decision immediately positive response from workers around the world. In May 1, 1890, Europe and the United States to lead the working class to the streets, held a grand demonstrations and rallies, fighting for the legal rights and interests. From then on, every day working people of all countries in the world to rally, parade, to show to celebrate. The heart of china!