Fait mathématique: 1893 is the number of 3×3 sliding puzzle positions that require exactly 14 moves to solve starting with the hole in a corner.
Culture générale: 1893 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: March 7th is the day in 1900 that the German liner SS Kaiser Wilhelm der Grosse becomes the first ship to send wireless signals to shore.