https://infogalactic.com/info/Flag_Day_(United_States)
> [Flag Day] commemorates the adoption of the flag of the United States, which happened on that day in 1777 by resolution of the Second Continental Congress.[1] The United States Army also celebrates the Army Birthday on this date; Congress adopted "the American continental army" after reaching a consensus position in the Committee of the Whole on June 14, 1775.