Hecho matemático: 2176 is the number of prime knots with 12 crossings.
Trivia: 2176 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: December 15th is the day in 1942 that the Battle of Mount Austen, the Galloping Horse, and the Sea Horse begins during the Guadalcanal campaign.