Malaysians observe a number of holidays and festivities throughout the year. 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).