Fait mathématique: 5559 is an unremarkable number.
Culture générale: 5559 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: March 21st is the day in 1965 that Martin Luther King, Jr. leads 3,200 people on the start of the third and finally successful civil rights march from Selma to Montgomery, Alabama.