This legal holiday is celebrated in the United States on the first Monday of every September. The first Labor Day celebration dates back to a parade in New York on Tuesday, September 5, 1882. More than half the states were celebrating Labor Day by 1893, but it wasn't made a national holiday until June 28, 1894, when President Grover Cleveland signed it into law.
Historical encyclopedia of American labor by edited by Robert Weir and James P. Hanlan
Labor conflict in the United States: an encyclopedia by edited by Ronald L. Filippelli — editorial assistant, Carol Reilly
US Labor History
Bread--and roses: the struggle of American labor, 1865- 1915 by Milton Meltzer — illustrated with contemporary prints & photographs — Using diaries, newspaper reports and other source material, the author shows the industrialization of America and the workers' struggle for higher working standards.