Flag Day is celebrated annually on June 14. This day commemorates the adoption of the official flag of the United States by the Continental Congress in 1777. Before the adoption of the "Stars and Stripes," several flags were used during the American Revolutionary period, each reflecting the evolving identity and unity of the American colonies, including the Grand Union, Gadsden, Bennington, and the Sons of Liberty flags. The adoption of the Stars and Stripes on June 14, 1777, provided a unifying emblem for the young nation. Flag Day not only celebrates the current flag but also honors the rich history and evolution of the flags that preceded it.The idea of a special day to honor the flag is believed to have originated in the late 19th century, with Bernard J. Cigrand, a small-town Wisconsin teacher, often credited as the "Father of Flag Day." He and others promoted the observance through articles, speeches, and advocacy efforts.

Flag Day was officially established by President Woodrow Wilson in 1916 with a proclamation that June 14 be observed as National Flag Day. It wasn't until August 3, 1949, that President Harry S. Truman signed an Act of Congress designating June 14 of each year as National Flag Day. Flag Day is not a federal holiday, but is widely observed with events and activities, including flag-raising ceremonies, parades in some communities, and educational programs focused on the history and significance of the American flag.