05/01/1946
https://www.presidency.ucsb.edu...
"I, Harry S. Truman, President of the United States of America, do hereby call upon the people of the United States to observe May 22, 1947, as National Maritime Day by displaying the flag at their hom..."
"I direct that the flag be displayed on that day on all Government buildings."
"Now, Therefore, I, Harry S. Truman, President of the United States of America, do hereby designate May 1, 1947, as Child Health Day; and I invite interested individuals and agencies to observe the day..."
"Now, Therefore, I, Harry S. Truman, President of the United States of America, acting under and by virtue of the authority vested in me by section 5(b) of the Trading with the Enemy Act of October 6, ..."