Fait général: 2509 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 2509 is an uninteresting number.
Culture générale: 2509 is an uninteresting number.
Date historique: November 13th is the day in 1986 that the Compact of Free Association becomes law, granting the Federated States of Micronesia, the Marshall Islands independence from the United States.