五一劳动节的由来英文版如下：

May 1st International Labor Day originated from the strike of workers' congresses in Chicago, USA. On May 1, 1886, more than 216,000 workers in Chicago went on a general strike for the eight-hour work system. After a painstaking and bloody struggle, they finally won. In commemoration of this great workers' movement, the Second International announced in July 1889 that May 1 will be designated as International Labor Day every year.

这个节日是为了纪念1886年5月1日芝加哥的工人大罢工，该罢工旨在争取八小时工作制。经过艰苦卓绝的斗争，工人们最终取得了胜利。为了纪念这一伟大的工人运动，第二国际在1889年7月14日宣布将每年的5月1日定为国际劳动节。