Fait mathématique: 2119 is a value of n for which |cos(n)| is smaller than any previous integer.
Culture générale: 2119 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: October 19th is the day in 1956 that the Soviet Union and Japan sign a Joint Declaration, officially ending the state of war between the two countries that had existed since August 1945.