Fait mathématique: 1779 is the smallest number whose 4^{th} power has 13 digits.
Culture générale: 1779 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: November 13th is the day in 1982 that the Vietnam Veterans Memorial is dedicated in Washington, D.C. after a march to its site by thousands of Vietnam War veterans.