The first Monday of September is celebrated as Labor Day in the United States. The origins of this holiday go back to a parade organized by Knights of Labor, an early union, the on September 5, 1882 in New York City.

This quote appears on the U.S. Department of Labor’s website:

"Labor Day differs in every essential way from the other holidays of the year in any country," said Samuel Gompers, founder and longtime president of the American Federation of Labor. "All other holidays are in a more or less degree connected with conflicts and battles of man's prowess over man, of strife and discord for greed and power, of glories achieved by one nation over another. Labor Day...is devoted to no man, living or dead, to no sect, race, or nation.