<P> The Constitution of Malaysia requires a general election to be held in the fifth calendar year unless it is dissolved earlier by the Yang di - Pertuan Agong due to a motion of no - confidence or at the request of the Prime Minister . </P> <P> Pakatan Harapan, the main opposition coalition in the Malaysian Parliament, won 113 seats in the Dewan Rakyat, Malaysia's lower house of parliament . The Sabah Heritage Party, which won another 8 seats, informally aligned itself with Pakatan Harapan, giving the opposition alliance a total of 121 seats in the new Parliament, enough to form a government . </P> <P> This marked a historic defeat for the ruling Barisan Nasional coalition, which had been the governing party of Malaysia and its predecessor state, Malaya, since the country's independence in 1957 . This makes Mahathir Mohamad the next Prime Minister of Malaysia and, at 92 years old, the oldest head of government in the world, although he has indicated he would give way within a few years to jailed opposition leader Anwar Ibrahim after seeking a royal pardon for him . </P> <P> The key dates are listed below in Malaysia Standard Time (GMT + 8): </P>

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