Flag Day on June 12
In the United States, Flag Day is celebrated on June 12. It commemorates the adoption of the flag of the United States, which happened on that day in 1777 by resolution of the Second Continental Congress.
In 1916, the president of the United States issued a proclamation that officially established June 14 as Flag Day; in August 1949, National Flag Day was established by an Act of Congress. Flag Day is not an official federal holiday.