He ascended the throne of Maldives on 22 February 1935; however his coronation ceremony was not held until 20 August 1938.

Sultan Hassan Nooraddeen II was born in 21 April 1887 in Malé.

WWII began during this Sultan's reign and the British were given the use of some islands in Addu Atoll and a military facility for the British army, Navy, and Air Force were built on the atoll.

The poll tax was abolished during Sultan Hassan Nooraddeen II's reign, instead duty was levied on certain trade items.

The Maldivian Government Bodu Store started in 1942 to ensure that islanders received better prices than those they obtained from the foreign traders in Malé.