Fatto matematico: 4380 is the number of ways to place 2 non-attacking bishops on a 10×10 chessboard.
Trivia: 4380 is an uninteresting number.
Data storica: December 28th is the day in 1895 that the Lumière brothers perform for their first paying audience at the Grand Cafe in Boulevard des Capucines, marking the debut of the cinema.