Mathematical fact: 2510 is the maximum value of n so that there exist 6 denominations of stamps so that every postage from 1 to n can be paid for with at most 10 stamps.
Trivia: 2510 is an unremarkable number.
Historical date: November 14th is the day in 1967 that the Congress of Colombia, in commemoration of the 150 years of the death of Policarpa Salavarrieta, declares this day as "Day of the Colombian Woman".