Fait mathématique: 1775 is a member of the Fibonacci-type sequence starting with 1 and 7.
Culture générale: 1775 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: November 9th is the day in 694 that Egica, a king of the Visigoths of Hispania, accuses Jews of aiding Muslims, sentencing all Jews to slavery.