Flag Day was first observed in a Wisconsin school on June 14, 1885. The teacher who initiated the first Flag Day observance launched a national campaign, which spurred schools and cities around the nation to begin similar observances.

In 1949, President Truman signed a proclamation declaring June 14th of each year as National Flag Day.

Sites listed in this category focus on the history and observance of Flag Day. Sites which focus on the U.S. Flag, but not Flag Day, are more appropriately listed in Reference/Flags/Regional/USA. Sites designed especially for children are listed in http://dmoz.org/Kids_and_Teens/People_and_Society/Holidays_and_Celebrations/Flag_Day/.