On the recordNovember 12, 1964
Now, Therefore, I, Lyndon B. Johnson,President of the United States of America, do hereby call upon the people of this Nation, and their local and national government officials, to observe Wright Brothers Day, December 17, 1964, with appropriate ceremonies and activities, both to recall the accomplishments of the Wright brothers and to provide a stimulus to aviation in this country and throughout the world.
Source
presidency.ucsb.edu
