05/14/1945
https://www.presidency.ucsb.edu...
"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 direct that the flag of the United States be displayed on all Government buildings on that 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"
"We went into the United Nations in earnest, and we have endeavored ever since we have been in that organization to make it work, and we shall continue to try to make it work."