Flag Day is a holiday celebrated on June 14 in the United States. It commemorates the adoption of the flag of the United States on June 14, 1777 by resolution of the Second Continental Congress. The Flag Resolution stated "That the flag of the thirteen United States be thirteen stripes, alternate red and white; that the union be thirteen stars, white in a blue field." The United States Army also celebrates the U.S. Army birthday on this date, as Congress adopted the American continental army on June 14, 1775. Happy Flag Day!