Fait mathématique: 1505 is the number of necklaces possible with 6 beads, each being one of 5 colors.
Culture générale: 1505 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: February 13th is the day in 1979 that an intense windstorm strikes western Washington and sinks a 1/2-mile-long section of the Hood Canal Bridge.