Hecho matemático: 2175 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 2175 is a boring number.
Fecha histórica: December 14th is the day in 1911 that Roald Amundsen's team, comprising himself, Olav Bjaaland, Helmer Hanssen, Sverre Hassel, and Oscar Wisting, becomes the first to reach the South Pole.