Richard Nixon actually said...
Now, Therefore, I, Richard Nixon, President of the United States of America, do hereby proclaim Tuesday, April 14, as Pan American Day, and the week beginning April 12 and ending April 18 as Pan American Week; and I call upon the Governors of the fifty States of the Union, the Governor of the Commonwealth of Puerto Rico, and the officials of all other areas under the flag of the United States to issue similar proclamations.
Context
Proclamation 3978—Pan American Day and Pan American Week, 1970
04/09/1970