Fait mathématique: 4460 is the number of 10-ominoes without holes.
Culture générale: 4460 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: March 17th is the day in 1948 that Benelux, France, and the United Kingdom sign the Treaty of Brussels, a precursor to the North Atlantic Treaty establishing NATO.