For a lot of people, Labor Day means two things: a day off and the end of summer. But why is it called Labor Day? Labor Day is a day set aside to pay tribute to working men and women. It has been celebrated as a national holiday in the United States and Canada since 1894.

The first Labor Day parade occurred Sept. 5, 1882, in New York City. The workers' unions chose the first Monday in September because it was halfway between Independence Day and Thanksgiving.

In European countries, China and other parts of the world, May Day, the first day in May, is a holiday to celebrate workers and labor unions. Before it became an international workers holiday, May Day was a celebration of spring and the promise of summer.