And see who salutes:
In the United States, Flag Day is celebrated on June 14. It commemorates the adoption of the flag of the United States, which happened that day by resolution of the Second Continental Congress in 1777.The June 14 date is also when Congress adopted "the American continental army" after reaching a consensus position in The Committee of the Whole. 
Flag Day is not an official federal holiday, though on June 14, 1937, Pennsylvania became the first (and only) U.S. state to celebrate Flag Day as a state holiday, beginning in the town of Rennerdale. Title 36 of the United States Code, Subtitle I, Part A, CHAPTER 1, § 110 is the official statute on Flag Day; however, it is at the President's discretion to proclaim officially the observance.