Fait mathématique: 9903 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 9903 is an unremarkable number.
Date historique: February 10th is the day in 1355 that the St. Scholastica's Day riot breaks out in Oxford, England, leaving 63 scholars and perhaps 30 locals dead in two days.