02/28/1963
https://www.presidency.ucsb.edu...
"I recommend that we now join with other nations through UNESCO in preventing what would otherwise be an irreparable loss to science and the cultural history of Mankind."
"You have our warmest good wishes for every success."
"Now, Therefore, I, John F. Kennedy,President of the United States of America, call upon the appropriate officials of the Government to display the flag of the United States on all Government buildings..."
"I do hereby urge the people of the United States to honor our Merchant Marine on Monday, May 22, 1961, by displaying the flag of the United States at their homes or other suitable places"