02/20/1951
https://www.presidency.ucsb.edu...
"This order shall become effective on April 1, 1947."
"Such further measures and dispositions as may be determined by the Director of the Bureau of the Budget to be necessary to effectuate the purposes and provisions of this order shall be carried out in ..."
"I, Harry S. Truman,President of the United States of America, do hereby set apart the month of April 1947 as Cancer Control Month, and do invite the Governors of the several States and the Territories..."
"In view of the significance and urgency of international health problems, I consider it important that the United States join the World Health Organization as soon as possible."