07/20/1966
https://www.presidency.ucsb.edu...
"Now, Therefore, I, Lyndon B. Johnson, President of the United States of America, do hereby designate the period of October 10 through October 15, 1966, as National ZIP Code Week."
"I am convinced that the ZIP Code has done more than any other recent innovation to move our postal service out of the age of the horse and buggy."
"We have passed 65 good, solid pieces of legislation."
"The highest and best form of efficiency is the spontaneous cooperation of a free people."