http://www.history.com/photos/labor-day View photos celebrating the History of Labor Day en Copyright 2013, History.com Tue, 21 May 2013 04:00:00 GMT History.com 2013-05-21T04:00:00Z en Copyright 2013, History.com http://www.history.com/photos/labor-day/photo1 Steel Workers march for labor rights at a Trade Union Protest in Washington, D.C. http://www.history.com/photos/labor-day/photo1 http://www.history.com/photos/labor-day/photo2 Leader of the National Farm Workers Association, Chavez used marches, non-violence, and hunger-strikes to improve labor rights. http://www.history.com/photos/labor-day/photo2 http://www.history.com/photos/labor-day/photo3 The United Auto Workers is the main labor union at American car companies. http://www.history.com/photos/labor-day/photo3 http://www.history.com/photos/labor-day/photo4 Aerospace Machinists assemble picket signs for a strike against Boeing. http://www.history.com/photos/labor-day/photo4 http://www.history.com/photos/labor-day/photo5 The headquarters of the AFL-CIO, the largest U.S. trade union with over 10 million members. http://www.history.com/photos/labor-day/photo5 http://www.history.com/photos/labor-day/photo6 American flags are attached to the hood of a Cadillac convertible during a Labor Day celebration in New York City. http://www.history.com/photos/labor-day/photo6 http://www.history.com/photos/labor-day/photo7 A World War II pro-labor poster from 1943. http://www.history.com/photos/labor-day/photo7 http://www.history.com/photos/labor-day/photo8 A sign celebrating the 1937 Sit-downers strike, which resulted in the first union contract with an automaker. http://www.history.com/photos/labor-day/photo8 http://www.history.com/photos/labor-day/photo9 Celebrated on May 1, World Labor Day pays tribute to workers everywhere. http://www.history.com/photos/labor-day/photo9 http://www.history.com/photos/labor-day/photo10 A young girl tends the spinning machine at a cotton mill in North Carolina. Children worked adult hours for pennies in mills and factories all over the United States until the Fair Labor Standards Act of 1938. http://www.history.com/photos/labor-day/photo10 http://www.history.com/photos/labor-day/photo11 Tennessee Valley Authority was a government program that hired workers during the Great Depression. http://www.history.com/photos/labor-day/photo11 http://www.history.com/photos/labor-day/photo12 Phillip Randolph and other officials of the Pullman Porter's and Conductor's Union in the 1939 Labor Day Parade in New York. http://www.history.com/photos/labor-day/photo12 http://www.history.com/photos/labor-day/photo13 The 15th United States Infantry Company C, called in by President Cleveland to help break up a railroad strike against the Pullman Palace Car Company, a major strike in American history. http://www.history.com/photos/labor-day/photo13 http://www.history.com/photos/labor-day/photo14 Pittsburgh was the setting for one of the first Labor Day parades in 1882. http://www.history.com/photos/labor-day/photo14