Harry Truman actually said...

"You can make that contribution on a world basis."

"I direct, also, that on that day the flag of the United States be displayed on all Government buildings."

"I invite the people of the United States to observe the day in schools and churches, or other suitable places, with appropriate ceremonies expressive of the public sentiment befitting the anniversary ..."

"I invite the people of the United States to observe the day in appropriate ceremonies in schools and churches or other suitable places"