In the late 1800s, many Americans toiled 12 hours a day, seven days a week, often in physically demanding, low-paying jobs. Children worked too, on farms and in factories and mines. Conditions were often harsh and unsafe.

It was in this context that American workers held the first Labor Day parade, marching from New York’s City Hall to a giant picnic at an uptown park on Sept. 5, 1882.

Source: What Is Labor Day? A History of the Workers’ Holiday – The New York Times