Fait général: 1958 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1958 is the number of partitions of 25.
Culture générale: 1958 is an uninteresting number.
Date historique: May 11th is the day in 1967 that Andreas Papandreou, Greek economist and socialist politician, is imprisoned in Athens by the Greek military junta.