Fait mathématique: 2937 is a value of n for which n and 5n together use each digit 1-9 exactly once.
Culture générale: 2937 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: January 15th is the day in 1936 that the first building to be completely covered in glass, built for the Owens-Illinois Glass Company, is completed in Toledo, Ohio.