From the 1965 edition:
It is a day of heroes, a day to remember their sacrifices and their deeds; a day of memories of loved ones and friends; a day where we are all united in a common purpose to honor and remember others– and what they did to preserve our country and our freedom.
Mary E. Hazeltine. Judith K. Sollenberger, ed. Anniversaries and Holidays: A Calendar of Days and How to Observe Them Second Edition, Completely Revised. American Library Association, Chicago. 1965.