10/11/1964
https://www.presidency.ucsb.edu...
"I do hereby call to the attention of the people of the United States that November 4, 1966, is the Twentieth Anniversary of UNESCO and call upon them to observe the occasion with appropriate ceremonie..."
"Our Government was active in the founding of UNESCO."
"UNESCO has a critical role to play in bringing the educational techniques of the developed world to the newly emerging nations of man's family."
"We have set aside one day of the year to honor the dead and the living whose actions have testified to their courage and devotion to country."