Fait mathématique: 1812 is the number of fullerenes with 60 carbon atoms.
Culture générale: 1812 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: December 16th is the day in 1497 that Vasco da Gama rounds the Cape of Good Hope, the point where Bartolomeu Dias had previously turned back to Portugal.