Fait mathématique: 4730 is the number of multigraphs with 5 vertices and 13 edges.
Culture générale: 4730 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: December 12th is the day in 1950 that Paula Ackerman, the first woman appointed to perform rabbinical functions in the United States, leads the congregation in her first services.