Government of Singapore and merger with Malaysia in 1963. Apart from that, the executive branch of the Singapore Government remained largely unchanged, although now it governed a state within a larger federation. However, with effect from 9 August 1965, Singapore left the Federation of Malaysia and became a fully independent republic. On separation from Malaysia, the Singapore Government retained the executive authority it held, and took on additional executive authority over Singapore that the Parliament of Malaysia relinquished. The Yang di-Pertuan Agong, the Supreme Head of State of Malaysia, also ceased to be the Supreme Head of Singapore and relinquished his sovereignty, jurisdiction,
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