The Sunday which falls on or nearest the tenth day of August of each year is hereby designated as Herbert Hoover Day, which shall be a recognition day in honor of the late President Herbert Hoover. The governor is hereby authorized and requested to issue annually a proclamation designating such Sunday as Herbert Hoover Day and calling on the people and officials of the state of Iowa to commemorate the life and principles of Herbert Hoover, to display the American flag, and to hold appropriate services and ceremonies.