June 17 » The United States Navy Hospital Corps is established.
August 23 » The Southern Cross Expedition, the first British venture of the Heroic Age of Antarctic Exploration, departs from London.
August 24 » Count Muravyov, Foreign Minister of Russia presents a rescript that convoked the First Hague Peace Conference.
August 28 » Caleb Bradham's beverage "Brad's Drink" is renamed "Pepsi-Cola".
September 10 » Empress Elisabeth of Austria is assassinated by Luigi Lucheni.
December 26 » Marie and Pierre Curie announce the isolation of radium.
Day of death December 18, 1984
The temperature on December 18, 1984 was between 1.1 °C and 6.3 °C and averaged 3.6 °C. There was 0.1 mm of rain during 0.2 hours. The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from Thursday, November 4, 1982 to Monday, July 14, 1986 the cabinet Lubbers I, with Drs. R.F.M. Lubbers (CDA) as prime minister.
February 3 » Space Shuttle program: STS-41-B is launched using Space Shuttle Challenger.
February 24 » Tyrone Mitchell perpetrates the 49th Street Elementary School shooting in Los Angeles, killing two children and injuring 12 more.
May 8 » The Thames Barrier is officially opened, preventing the floodplain of most of Greater London from being flooded except under extreme circumstances.
June 18 » A major clash between about 5,000 police and a similar number of miners takes place at Orgreave, South Yorkshire, during the 1984–85 UK miners' strike.
October 12 » The Provisional Irish Republican Army fail to assassinate Prime Minister Margaret Thatcher and her cabinet. The bomb kills five people and wounds 31.
November 14 » Zamboanga City mayor Cesar Climaco, a prominent critic of the government of Philippine President Ferdinand Marcos, is assassinated in his home city.
When copying data from this family tree, please include a reference to the origin: Hendrik de Graaf, "Family tree Plugboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plugboer/I18384.php : accessed February 11, 2026), "Jeanne Catharina Zwart (1898-1984)".
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