05/06/1963
https://www.presidency.ucsb.edu...
"I invite the people of the United States to observe the day with appropriate ceremonies in their churches, schools, and other suitable places."
"I also direct the appropriate officers of the Federal Government to display the flag of the United States on all Government buildings on that day."
"I request the appropriate officers of the State and local governments likewise to display the flag to mark the anniversary."
"I, John F. Kennedy, President of the United States of America, do hereby designate Saturday, October 12, 1963, as Columbus Day, commemorating the four hundred and seventy-first anniversary of the sigh..."