39 to 48 Stars

I pledge allegiance to the Flag of the United States of American, and to the Republic for which it stands, one Nation, under God, indivisible, with liberty and justice for all.
I am whatever you make me, nothing more. I am your belief in yourself, your dream of what a people may become. I am no more than what you believe me to be, and I am all that you believe I can be. I am what you make me, nothing more.
Franklin Lane, Secretary of the Interior speaking to 1,000 of his staff quoting the Flag on Flag Day 1917

In 1949, President Truman designated June 14th as National Flag Day.