General fact: 1944 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 1944 is a member of the Fibonacci-like multiplication series starting with 2 and 3.
Trivia: 1944 is an unremarkable number.
Historical date: April 27th is the day in 1967 that Expo 67 officially opens in Montreal, Canada with a large opening ceremony broadcast around the world.