Labor Day

From Wikipedia:

Labor Day has been celebrated on the first Monday in September in the United States since the 1880s. The form for the celebration of Labor Day was outlined in the first proposal of the holiday—a street parade to exhibit to the public "the strength and esprit de corps of the trade and labor organizations," followed by a festival for the workers and their families. This became the pattern for Labor Day celebrations. Speeches by prominent men and women were introduced later, as more emphasis was placed upon the economic and civil significance of the holiday.