Labor Day, holiday celebrated in the United States and Canada on the first Monday in September to honor the laborer. It was inaugurated by the Knights of Labor in 1882 and made a national holiday by the U.S. Congress in 1894. In most other countries—and among the leftists in the United States and Canada—May Day (May 1) is celebrated instead.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.