Fait mathématique: 1948 is the number of 4×4 sliding puzzle positions that require exactly 10 moves to solve starting with the hole in a corner.
Culture générale: 1948 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: May 1st is the day in 1927 that the first cooked meals on a scheduled flight are introduced on an Imperial Airways flight from London to Paris.