Just in case you wanted to know how it started. Beginning in the late 19th century as the trade union and labor movements grew, the unionists proposed that a day be set aside to celebrate labor. “Labor Day” was promoted by the Central Labor Union and the Knights of Labor which organized the first parade in New York City. In 1887, Oregon was the first state to make it an official l public holiday. By the time it became an official federal holiday in 1894, thirty states officially celebrated Labor Day. Monday was chosen to give workers a three day weekend.