Fait mathématique: 1453 is a member of the Fibonacci-type sequence starting with 2 and 5.
Culture générale: 1453 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: December 23rd is the day in 1968 that the 82 sailors from the USS Pueblo are released after eleven months of internment in North Korea.