Fait mathématique: 2075 is the number of connected graphs with 9 vertices and 11 edges.
Culture générale: 2075 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: September 5th is the day in 1991 that the current international treaty defending indigenous peoples, Indigenous and Tribal Peoples Convention, 1989, came into force.