General fact: 14 is the number of days in a fortnight.
Mathematical fact: 14 is this number is the lowest even n for which the equation φ(x) = n has no solution, making it the first even nontotient (see Euler's totient function).
Trivia: 14 is the number of pounds in a stone in traditional British units of weight.
Historical date: January 14th is the day in 1761 that the Third Battle of Panipat is fought in India between the Afghans under Ahmad Shah Durrani and the Marhatas.