May Day, celebrated by workers across the globe as International Labor Day, falls on May 1.

But you'd be forgiven if that's news to you. While the day traces its origins to an American laborers' fight for a shorter work day, the U.S. does not officially recognize International Labor Day.

Like other countries that mark Labor Days on different dates, the U.S. and Canada celebrate their Labor Day in September.
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The History Of America's Fight For Fair Labor

U.S. resistance to celebrate International Labor Day — also called International Workers' Day — in May stems from a resistance to emboldening worldwide working-class unity, historians say...