Fatto matematico: 2531 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 2531 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: December 5th is the day in 2005 that the Civil Partnership Act comes into effect in the United Kingdom, and the first civil partnership is registered there.