February 17 » In Sweden February 17 is followed by March 1 as the country moves from the Julian calendar to the Gregorian calendar.
May 1 » Publication of Species Plantarum by Linnaeus, and the formal start date of plant taxonomy adopted by the International Code of Botanical Nomenclature.
When copying data from this family tree, please include a reference to the origin: Wim Glas, "Family tree Glas", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-glas/I472.php : accessed March 1, 2026), "Joannes Henricus (Jan) Hannink (1753-< 1792)".
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