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 1973 that the Pulitzer Prize-winning photograph Burst of Joy is taken, depicting a former prisoner of war being reunited with his family.