01/26/1966
https://www.presidency.ucsb.edu...
"Now, Therefore, I, Lyndon B. Johnson, President of the United States of America, do hereby designate Friday, May 20, 1966, as National Defense Transportation Day, and the week beginning May 15, 1966, ..."
"The White House gates will always swing wide for you."
"There is no mistaking it."
"I also invite the Governors of the States to provide for the observance of National Defense Transportation Day and National Transportation Week."