Fait général: 2090 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 2090 is the number of possible rows in a 17×17 crossword puzzle.
Culture générale: 2090 is an uninteresting number.
Date historique: September 20th is the day in 1857 that the Indian Rebellion of 1857 ends with the recapture of Delhi by troops loyal to the East India Company.