51 international Labor Days call 51 sections, May 1 in every year.It is the whole world labor common festival of the people.

五一國際勞動節(jié)簡稱五一節(jié)，在每年的5月1日。它是全世界勞動人民的共同節(jié)日。

As for"51 causes of the section"s are such:

關(guān)于“五一節(jié)的由來”是這樣的：

This stanza comes from the worker’s big strike of American Chicago.On May 1 in 1886, Chicago of 20 in order to fight for practicing eight hours to work to make but hold the big strike, many ten thousand workerses pass by hard of bloodshed conflict, acquired the victory finally.For memorial this time the socialist that the worker’s one who exercise, July 14 in 1889, from all countries Marxist call represents the conference, Parisian solemn and impressive open in France.On the conference, attend meeting to represent the consistent approval:Common festival that May 1 settles for the international proletariat.This resolution gets the international community, the worker responds to actively.On May 1 in 1890, the working class of Euro-American all countries leads off to go into the street, holding the grand demonstration and holding a meeting, fighting for the legal rights.From now on, every time round this international community labors the people to all want the catcall, parade, to show to celebrate.

此節(jié)源于美國芝加哥的工人大罷工。1886年5月1日，芝加哥的20 多萬工人為爭取實行八小時工作制而舉行大罷工，經(jīng)過艱苦的流血斗爭，終于獲得了勝利。為紀(jì)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，與會代表一致同意：把5月1日定為國際無產(chǎn)階級的共同節(jié)日。這一決議得到世界各國工人的積極響應(yīng)。1890年5月1日，歐美各國的工人階級率先走上街頭，舉行盛大的示威游行與集會，爭取合法權(quán)益。從此，每逢這一天世界各國的勞動人民都要集會、游行，以示慶祝。