The first USA Labor Day parade is held in New York City.

Observed on the first Monday in September, Labor Day pays tribute to the contributions and achievements of American workers. It was created by the labor movement in the late 19th century and became a federal holiday in 1894. Labor Day also symbolizes the end of summer for many Americans, and is celebrated with parties, parades and athletic events.

Labor Day, an annual celebration of workers and their achievements, originated during one of American labor history’s most dismal chapters. In the late 1800s, at the height of the Industrial Revolution in the United States, the average American worked 12-hour days and seven-day weeks in order to eke out a basic living. Despite restrictions in some states, children as young as 5 or 6 toiled in mills, factories and mines across the country, earning a fraction of their adult counterparts’ wages. People of all ages, particularly the very poor and recent immigrants, often faced extremely unsafe working conditions, with insufficient access to fresh air, sanitary facilities and breaks.

As manufacturing increasingly supplanted agriculture as the wellspring of American employment, labor unions, which had first appeared in the late 18th century, grew more prominent and vocal. They began organizing strikes and rallies to protest poor conditions and compel employers to renegotiate hours and pay. Many of these events turned violent during this period, including the infamous Haymarket Riot of 1886, in which several Chicago policemen and workers were killed. Others gave rise to longstanding traditions: On September 5, 1882, 10,000 workers took unpaid time off to march from City Hall to Union Square in New York City, holding the first Labor Day parade in U.S. history.