Head of state second and last incumbent of the office, Yusof bin Ishak, kept the style at 31 August 1963 unilateral declaration of independence and after 16 September 1963 accession to Malaysia as a state (so now as a constituent part of the federation, a non-sovereign level). After its expulsion from Malaysia on 9 August 1965, Singapore became a sovereign Commonwealth republic and installed Yusof bin Ishak as its first President. In 1959 after the resignation of Vice President of Indonesia Mohammad Hatta, President Sukarno abolished the position and title of vice president, assuming the positions of Prime Minister and Head of Cabinet.
Malaysia Some are federally gazetted public holidays and some are observed by individual states. Other festivals are observed by particular ethnic or religion groups, and the main holiday of each major group has been declared a public holiday. The most observed national holiday is "Hari Merdeka" (Independence Day) on 31 August, commemorating the independence of the Federation of Malaya in 1957. Malaysia Day on 16 September commemorates federation in 1963. Other notable national holidays are Labour Day (1 May) and the King's birthday (first week of June). Muslim holidays are prominent as Islam is the state religion; "Hari Raya Puasa" (also