Flag Day - June 14

In the United States, Flag Day is celebrated on June 14. It commemorates the adoption of the flag of the United States on June 14, 1777 by resolution of the Second Continental Congress. The United States Army also celebrates the U.S. Army birthday on this date; Congress adopted "the American continental army" after reaching a consensus position in the Committee of the Whole on June 14, 1775.

Perhaps the oldest continuing Flag Day parade is in Fairfield, Spokane county, Washington. Beginning in 1909 or 1910, Fairfield has held a parade every year since, with the possible exception of 1918, and celebrated the "Centennial" parade in 2010, along with some other commemorative events. Appleton, Wisconsin, claims to be the oldest National Flag Day parade in the nation, held annually since 1950.

--Wikipedia