Fatto matematico: 1871 is a number n for which n, n+2, n+6, and n+8 are all prime.
Trivia: 1871 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: February 13th is the day in 1867 that Work begins on the covering of the Zenne, burying Brussels's primary river and creating the modern central boulevards.