Labor Day is a federal holiday in the United States celebrated
on the first Monday of September to honor and recognize the
American labor movement and the works and contributions of
laborers to the development and achievements in the United
States.

Beginning in the late 19th century, as the trade union and labor movements grew, trade unionists proposed that a day be set
aside to celebrate labor. "Labor Day" was promoted by the
Central Labor Union and the Knights of Labor, which organized
the first parade in New York City. In 1887, Oregon was the first
state of the United States to make it an official public holiday.

By the time it became an official federal holiday in 1894, thirty
states in the U.S. officially celebrated Labor Day.

(From Wikipedia, the free encyclopedia)

Armed Forces Day was first observed on 20 May 1950, the day
was created on 31 August 1949 as President Harry S. Truman
led the effort to establish a single holiday for citizens to come
together and thank military members for their patriotic service
in support of the republic and national interests and as an
undeniable fact of  American life.     

       
Secretary of Defense Louis A. Johnson announced the creation
to honor Americans serving in the five U.S. military branches –
the U.S. Army, U.S. Navy, U.S. Marine Corps, U.S. Air Force and
U.S. Coast Guard – following the consolidation of the military
services in the U.S. Department of Defense as part of a modern
US Armed Forces.    

Harry S. Truman( 1884 – 1972)