Fait général: 4388 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 4388 is an unremarkable number.
Culture générale: 4388 is a boring number.
Date historique: January 5th is the day in 1527 that Felix Manz, a leader of the Anabaptist congregation in Zurich, Switzerland, is executed by drowning.