On this day in 1777, during the American Revolution, the Continental Congress adopts a resolution stating that “the flag of the United States be thirteen alternate stripes red and white” and that “the Union be thirteen stars, white in a blue field, representing a new Constellation.”
June 14, 1877, the first Flag Day observance was held on the 100th anniversary of the adoption of the Stars and Stripes.
In 1949, Congress officially designated June 14, as Flag Day, a national day of observance.
48 Star Flag (1912-1959) flew during WWI and WWII.
Taken at the Naval Training Station in Great Lakes, Illinois, this photo includes about 10,000 U.S. Navy sailors dressed in either white or navy blue uniforms to create a “living photograph.” Creators: Arthur Mole and John Thomas, 1917.
Source: The Library of Congress