Fatto matematico: 4730 is the number of multigraphs with 5 vertices and 13 edges.
Trivia: 4730 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: December 12th is the day in 1979 that the unrecognised state of Zimbabwe Rhodesia returns to British control and resumes using the name Southern Rhodesia.