Fait mathématique: 2430 is the number of unordered ways to write 1 as a sum of reciprocals of integers no larger than 18.
Culture générale: 2430 is a boring number.
Date historique: August 26th is the day in 1278 that Ladislaus IV of Hungary and Rudolph I of Germany defeat Premysl Ottokar II of Bohemia in the Battle of Marchfield near Dürnkrut in (then) Moravia.