National Grandparents Day was signed into law by President Jimmy Carter in 1978. Marian McQuade received a phone call from the White House to advise her of this event. Many people believe that National Grandparents Day was inspired by her efforts. A presidential proclamation on September 6, 1979, made this day official – it designated Sunday, September 9, 1979, (being the “first Sunday of September following Labor Day”) as National Grandparents Day.

Each year the President is requested to issue a proclamation to: designate the first Sunday in September after Labor Day as National Grandparents Day; and to call on people, groups and organizations to observe the day with appropriate ceremonies and activities.