Fait mathématique: 2495 is the number of 13-iamonds that tile the plane.
Culture générale: 2495 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: October 30th is the day in 1960 that Michael Woodruff performs the first successful kidney transplant in the United Kingdom at the Edinburgh Royal Infirmary.