a) June 14, 1777

On June 14, 1777, the United States flag was officially adopted, becoming a national symbol. The Continental Congress passed a resolution establishing the flag’s design, featuring 13 stripes alternating red and white and 13 white stars on a blue field, representing the original colonies. This date is now celebrated as Flag Day in the United States. The adoption of the flag was a significant step in the formation of national identity and unity during the American Revolution, symbolizing the new nation and its ideals.