On Saturday, June 14, 1777, the Second Continental Congress adopted the Stars and Stripes as the first official national flag of the newly independent United States (later celebrated as Flag Day). The resolution creating the flag came from the Continental Marine Committee. Hopkinson became a member of the committee in 1776. At the time of the flag's adoption, he was the Chairman of the Navy Board, which was under the Marine Committee. Today, that office and responsibility/power would be residing in the United States Secretary of the Navy.