英文:May 1st International Labor Day originated from the strike of workerscongresses 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 workersmovement.the Second International announced in July 1889 that May 1 will be designated as International Labor Day every year。