Fatto generale: 2017 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2017 is a value of n for which f(n) = f(n-1) + f(n-2).
Trivia: 2017 is an uninteresting number.
Data storica: July 9th is the day in 1875 that Outbreak of the Herzegovina Uprising against Ottoman rule, which would last until 1878 and have far-reaching implications throughout the Balkans.