June 14, 1889: George Balch, a kindergarten teacher in New York City, planned appropriate ceremonies

June 14, 1889: George Balch, a kindergarten teacher in New York City, planned appropriate ceremonies for the children of his school, and his idea of observing Flag Day was later adopted by the State Board of Education of New York.

June 14, 1891: The Betsy Ross House in Philadelphia held a Flag Day celebration, and on June 14 of the following year, the New York Society of the Sons of the Revolution celebrated Flag Day.

April 25, 1893: The Pennsylvania Society of Colonial Dames of America adopted a resolution requesting the mayor of Philadelphia and all others in authority and all private citizens to display the flag June 14.

May 30, 1916: Inspired by decades of state and local celebrations, Flag Day — the anniversary of the Flag Resolution of 1777 — was officially established by the proclamation of President Woodrow Wilson. Flag Day was celebrated in various communities for years after Wilson’s proclamation.

Aug. 3, 1949: President Harry S. Truman signed an act of Congress designating June 14 of each year as National Flag Day.

Source: www.usflag.org/history/flagday.html