What aspect of the Japanese surrender that ended World War II occurred on 2 September 1945?

Question

Where was the landing of the main invasion force on the Italian peninsula in World War II by the allied army (comprising the U.S. Fifth Army and the British Eighth Army) on 9 September 1943?

Answer 1

Surrender document signed in Tokyo Bay
16 Aug: cease fire ordered, 2 Sept: surrender signed, 7 Sept: Singapore returned to Britain, 8 Sept: MacArthur entered Tokyo.