Fatto matematico: 6383 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 6383 is an unremarkable number.
Data storica: June 22nd is the day in 1944 that U.S. President Franklin D. Roosevelt signs into law the Servicemen's Readjustment Act of 1944, commonly known as the G.I.