告诉HN：五一劳动节快乐
5月1日在世界许多地方被庆祝为国际劳动节或工人节。这个日期是由美国劳工联合会选定的，以纪念1886年5月1日至5月4日的罢工，最终导致了海马克特事件的发生。
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1st May is celebrated in many parts of the world as International Worker’s Day or Labor Day. The date was chosen by the American Federation of Labor to commemorate the strike that went from 1st May to 4th May in 1886 and ended in the Haymarket Affair.