Fatto matematico: 2484 is the number of regions the complex plane is cut into by drawing lines between all pairs of 18^{th} roots of unity.
Trivia: 2484 is an uninteresting number.
Data storica: October 19th is the day in 1989 that the convictions of the Guildford Four are quashed by the Court of Appeal of England and Wales, after they had spent 15 years in prison.