Flag Day Celebrated Flag Day June 1886 Flag Day Celebrated June 14, 1777 Flag Day Celebrated Flag Day Celebrated Happy Flag Day! Flag Day Celebrated Flag Day Celebrated America's Story from America's Library Flag Day Celebrated 100th anniversary of Flag Day Flag Day Library of Congress americaslibrary.gov: Flag Day Celebrated Library of Congress americaslibrary.gov: Flag Day Celebrated May of 1916 Library of Congress Flag Day Celebrated: June 14, 1777 When did the U.S. actually start celebrating Flag Day? Flag Day Celebrated Flag Day Celebrated America's Story from America's Library