10/10/1966
https://www.presidency.ucsb.edu...
"I want you to know that I'll never be too busy to pay my respects to a great American."
"Now, Therefore, I, Lyndon B. Johnson, President of the United States of America, do hereby request that Sunday, May 8, 1966, be observed as Mother's Day."
"I call upon all Americans to make Mother's Day a truly memorable occasion by expressing both publicly and privately their love and reverence for their mothers."
"American mothers have inspired their children to seek right action, to temper harsh judgment with mercy, to treasure all that is noble in human character."