Fatto matematico: 2038 is the number of Eulerian graphs with 9 vertices.
Trivia: 2038 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: July 30th is the day in 1956 that a joint resolution of the U.S. Congress is signed by President Dwight D. Eisenhower, authorizing In God We Trust as the U.S. national motto.