Births on July 9

William Waldegrave, 1st Baron Radstock, English admiral and politician, 34th Lieutenant Governor of Newfoundland (d. 1825)

Admiral William Waldegrave, 1st Baron Radstock, GCB (9 July 1753 – 20 August 1825) was an officer in the Royal Navy and Governor of Newfoundland.

17 Feb

Gregorian calendar
In Sweden February 17 is followed by March 1 as the country moves from the Julian calendar to the Gregorian calendar.
1 May

International Code of Botanical Nomenclature
Publication of Species Plantarum by Linnaeus, and the formal start date of plant taxonomy adopted by the International Code of Botanical Nomenclature.