This holiday was began by labor unions fighting for the rights of workers. It is a US holiday which is celebrated annually on the first Monday of September.
Regular Websites
Present Labor Day history, leaders, an image gallery and video. - History.com: Labor Day
http://www.history.com/content/laborday
Offering a wide range of lesson plans, video and other resources for teachers. - Lesson Plans Page: Labor Day
http://www.lessonplanspage.com/LaborDay.htm
US Dept. of Labor: History of Labor Day
Government site features information about Labor Day history, the founder and legislative activity. - US Dept. of Labor: History of Labor Day
http://www.dol.gov/opa/aboutdol/laborday.htm