36 U.S.C. § 110
Flag Day
(a) Designation.—
June 14 is Flag Day.
(b) Proclamation.—
The President is requested to issue each year a proclamation—
(1)
calling on United States Government officials to display the flag of the United States on all Government buildings on Flag Day; and
(2)
urging the people of the United States to observe Flag Day as the anniversary of the adoption on June 14, 1777 , by the Continental Congress of the Stars and Stripes as the official flag of the United States.
( Pub. L. 105–225 , Aug. 12, 1998 , 112 Stat. 1256 .)