It is a federal holiday in the United States celebrated on the first Monday of September in honor and recognititon of the American labor movement as well as the works and contributions of laborers to the development and achievements in the United States.
It began as the trade union and labor movements grew in the late 19th century.
Trade unionists proposed that a day be set aside to celebrate labor.
I view it all as a commie plot for get over federal employees to leech another day's work from the taxpayer to go along with their largely undeserved Navy disability payments.