We celebrate Flag Day on June 14th because on that date in 1777, the Second Continental Congress adopted the Stars and Stripes for the flag of the United States¹. It was the first official design of the American flag, which has changed over time as new states joined the union⁵.
Flag Day is not a federal holiday, but it is a time to recognize the history and symbolism of the flag and display it with respect². The colors of the flag have meanings: red for valor and hardiness, white for purity and innocence, and blue for vigilance, perseverance and justice⁶.