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 1793 that the Battle of Savenay, decisive defeat of the royalist counter-revolutionaries in Revolt in the Vendée during the French Revolution.