Arthur Meighen becomes Prime Minister of Canada.

Arthur Meighen was the ninth prime minister of Canada, serving from 1920 to 1921 and in 1926. He led the Conservative Party from 1920 to 1926 and from 1941 to 1942.

The prime minister of Canada is the head of government of Canada. Under the Westminster system, the prime minister governs with the confidence of a majority of the elected House of Commons; as such, the prime minister typically sits as a member of Parliament (MP) and leads the largest party or a coalition of parties. As first minister, the prime minister selects ministers to form the Cabinet.

July 10 is the 191st day of the year in the Gregorian calendar; 174 days remain until the end of the year.