Fait mathématique: 1560 is the maximum number of pieces a torus can be cut into with 20 cuts.
Culture générale: 1560 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: April 8th is the day in 1904 that the French Third Republic and the United Kingdom of Great Britain and Ireland sign the Entente cordiale.