1866, the first international Geneva conference put forward the slogan that workers should implement the 8-hour working system. 1 886 in may1day, more than 216,000 workers in Chicago, USA went on strike to implement the 8-hour working system. On the 4th, the police suppressed and opened fire on the crowd, killing four workers and injuring many others. Protests were held all over Europe to support the workers' movement.

1889 On July 4th, the Second International led by Engels held its first congress in Paris, France. The meeting passed the labor bill and the May Day bill, decided to use the union strike as the weapon of workers' struggle, and designated May 1 day as the International Labor Day, which immediately received the response of workers all over the world. On May 1890 and 1 day, workers from European and American countries took the lead in taking to the streets and held grand demonstrations and assemblies to fight for their legitimate rights and interests. Since then, every year on this day, working people all over the world have to gather, March and celebrate.

In China, during the period of 1905, Dr. Sun Yat-sen publicized and introduced May Day in People's Daily, the organ newspaper of the League. At that time, the festival was translated as "a great demonstration of workers from all over the world".