John McEwen, Australian farmer and politician, 18th Prime Minister of Australia (died 1980)

Sir John McEwen was an Australian politician and farmer who served as the 18th prime minister of Australia from 1967 to 1968, in a caretaker capacity following the disappearance of prime minister Harold Holt. He was the leader of the Country Party from 1958 to 1971, serving as the inaugural deputy prime minister of Australia from 1968 to 1971.

The prime minister of Australia is the head of government of the Commonwealth of Australia. The prime minister is the chair of the Cabinet of Australia and thus the head of the federal executive government. Under the principles of responsible government, the prime minister is both responsible to and a member of the Commonwealth Parliament. The current prime minister is Anthony Albanese of the Australian Labor Party, who assumed the office on 23 May 2022.

March 29 is the 88th day of the year in the Gregorian calendar; 277 days remain until the end of the year.