1、此節源于美國芝加哥的工人大罷工。1886年5月1日，芝加哥的20 多萬工人為争取實行八小時工作制而舉行大罷工，經過艱苦的流血鬥争，終于獲得了勝利。為紀念這次工人運動，1889年7月14日，由各國馬克思主義者召集的社會主義者代表大會，在法國巴黎隆重開幕。大會上，與會代表一緻同意：把5月1日定為國際無産階級的共同節日。這一決議得到世界各國工人的積極響應。1890年5月1日，歐美各國的工人階級率先走上街頭，舉行盛大的示威遊行與集會，争取合法權益。從此，每逢這一天世界各國的勞動人民都要集會、遊行，以示慶祝。

　　2、The workers of this day from the Chicago strike. In May 1, 1886, Chicagos about 200000 workers for the implementation of the eight hour working day strike held, after a bloody hard struggle, finally achieved victory. To commemorate the labor movement, July 14, 1889, convened by the Marx doctrine socialists Congress opened in Paris, france. Conference, delegates agreed: the May 1st international proletarian common festival. This resolution received a positive response from workers in countries around the world. May 1, 1890, Europe and the United States took the lead in the streets of the working class, held a grand demonstration and rally to fight for the legitimate rights and interests. From then on, every day the working people of all the countries in the world have to rally and March to celebrate.