Fatto matematico: 1544 is the number of connected 4-regular graphs with 12 vertices.
Trivia: 1544 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: March 23rd is the day in 1848 that the ship John Wickliffe arrives at Port Chalmers carrying the first Scottish settlers for Dunedin, New Zealand.