Wikipedia:Selected anniversaries/June 23
June 23: Jaaniõhtu in Estonia, Jāņi in Latvia, Saint Jonas' Festival in Lithuania, Grand Duke's Official Birthday in Luxembourg.
- 1757 - Seven Years' War: British forces under Robert Clive defeated troops under Siraj ud-Daulah at the Battle of Plassey, allowing the British East India Company to annex Bengal.
- 1858 - Edgardo Mortara, a six-year-old Jewish boy, was seized by Papal authorities and taken to be raised as a Roman Catholic.
- 1887 - The Parliament of Canada passed the Rocky Mountains Park Act, creating Banff National Park (pictured) as Canada's first national park.
- 1894 - Led by French historian Pierre de Coubertin, an international congress at the Sorbonne in Paris founded the International Olympic Committee to reinstate the Ancient Olympic Games.
- 1972 - More than forty countries left the Sterling Area, allowing their currencies to float independently of the British Pound.