general_fact: 12 is the number of basic hues in the color wheel (3 primary colors (red, yellow, blue), 3 secondary colors (orange, green & purple) and 6 tertiary colors).
math_fact: 12 is a sublime number, a number that has a perfect number of divisors, and the sum of its divisors is also a perfect number.
trivia: 12 is the number of months in a year.
historical_date: January 12th is the day in 1895 that the National Trust is founded in the United Kingdom.