Hecho general: 1938 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 1938 is an unremarkable number.
Trivia: 1938 is an unremarkable number.
Fecha histórica: April 21st is the day in 1987 that the Tamil Tigers are blamed for a car bomb that explodes in the Sri Lankan city of Colombo, killing 106 people.