Fatto generale: 2038 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2038 is the number of Eulerian graphs with 9 vertices.
Trivia: 2038 is an uninteresting number.
Data storica: July 30th is the day in 1978 that the 730 (transport), Okinawa changes its traffic on the right-hand side of the road to the left-hand side.