In public, it's polite to limit bodily functions and bad habits.
President Jimmy Carter declared the first Sunday after Labor Day as Grandparents' Day in 1978.
The idea had been discussed since the late 1960s.
Americans thank their grandparents for their love, support, and care on this day.
The day honours grandparents' impact on their grandchildren.
Many families give gifts that honour family traditions during the festival.
Grandchildren spend time with grandparents on this day.