02/23/1949
https://www.presidency.ucsb.edu...
"Yes, that has already been approved, and will go down just as soon as the State Department is ready to send it down."
"I, Harry S. Truman, President of the United States of America, do hereby request the observance of Sunday, May 8, 1949, as Mother's Day"
"I also call upon the people of the Nation to display the flag at their homes or other suitable places on Mother's Day, 1949"
"I direct that the flag of the United States be displayed on all Government buildings on that day"