Divided into twelve regions this central banking system was really the brainchild of Alexander Hamilton, who thought the creation of a central bank was necessary for a strong nation.
While that was 1791 the system we know now wasn't put into place until 1913. An act, which "established a new central bank designed to add both flexibility and strength to the nation's financial system." This system opened for business on this day, 1914.

Question:
What is the central banking system of the United States that opened for business on this day, 1914?