Halifax, Nova Scotia, is founded.

Halifax is the capital and most populous municipality of the Canadian province of Nova Scotia, and the most populous municipality in Atlantic Canada. As of 2024, it is estimated that the population of the Halifax CMA was 530,167, with 348,634 people in its urban area. The regional municipality consists of four former municipalities that were amalgamated in 1996: Halifax, Dartmouth, Bedford, and Halifax County.

June 21 is the 172nd day of the year in the Gregorian calendar; 193 days remain until the end of the year.