On June 14, 1937, Pennsylvania became the first state to celebrate Flag Day as an official state holiday. To this day, Pennsylvania is still the only state to officially recognize Flag Day as a holiday.

Flag Day is celebrated every year on June 14. It commemorates the adoption of the flag of the United States, which happened by resolution of the Second Continental Congress in 1777. President Woodrow Wilson established Flag Day in 1916 through a Presidential proclamation. The actual observance of Flag Day was official until 1949, when President Harry Truman signed a statute establishing the day as a day of observance. However, it is not an official federal holiday. Title 36 of the U.S. Code established Flag Day, but leaves it to the President’s discretion to proclaim it an official holiday.

On June 14, 1937, Pennsylvania became the first - and still the only - U.S. state to celebrate Flag Day as a state holiday.

The week of June 14 is designated as National Flag Week, and the president issues a proclamation urging citizens to fly the American flag during the week. Additionally, the flag is to be displayed on all Government buildings. The National Flag Day Foundation holds an annual observance for Flag Day on the second Sunday in June. The program includes a ceremonial raising of the flag, recitation of the Pledge of Allegiance, singing of the National Anthem, and a parade.