title: Yates Stirling Jr.
context: On July 20, 1924, he became Captain of the Yard, Navy Yard, Washington, D.C., with additional duty as Assistant Superintendent of the Naval Gun Factory.  He was promoted to rear admiral on October 6, 1926 and in December that year Stirling was designated Chief of Staff to Admiral Charles F. Hughes, Commander in Chief, U.S. Fleet, based at San Pedro, California.[54]  At the October 27, 1927 Navy Day Ceremonies at San Pedro harbor, despite an all-day downpour, thousands of Southern Californians gathered for the festivities, including ships' tours, band performances of patriotic music and the key-note address given by Stirling, "Merchant Marine, the Navy and the Nation".[55]
question: When did Yates Stirling Jr. become an admiral?
answers: October 6, 1926