As wikipedia records: Merdeka Day, Malaysia
‘Today in Malaysia, in which Malaya, Sabah, Sarawak and Singapore merged in 1963, the term still remains pertinent in the present. It can be seen in the Malaysian national holiday of Hari Merdeka, commemorating Malaya’s independence on 31 August 1957, and Dataran Merdeka (Independence Square) where the first ceremony raising the flag of Malaya was held following independence. Sabah and Sarawak in North Borneo were to officially join Malaysia on 31 August 1963 but due to opposition from Indonesia and the Philippines and to allow theUnited Nations team time to conduct referendums in Sabah and Sarawak regarding their participation in a new federation, the date was postponed to 16 September, now celebrated as Malaysia Day.’
Tunku Abdul Rahman, the inaugural Malaysian Prime Minister, declared Malayan independence with seven shouts of “Merdeka”; the cry continues to be featured prominently in Malaysian Hari Merdeka celebrations.