January 31 » Czechoslav Trade Union Association is founded in Prague.
April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
August 21 » Oldsmobile, an American automobile manufacturer and marque, is founded.
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
December 9 » Activist Marguerite Durand founds the feminist daily newspaper La Fronde in Paris.
Day of marriage July 9, 1921
The temperature on July 9, 1921 was between 10.9 °C and 25.3 °C and averaged 19.0 °C. There was 14.8 hours of sunshine (90%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 20 » The British K-class submarine HMS K5 sinks in the English Channel; all 56 on board die.
May 8 » The creation of the Communist Party of Romania.
May 31 » The Tulsa race massacre kills at least 39, but other estimates of black fatalities vary from 55 to about 300.
July 23 » The Communist Party of China (CPC) is established at the founding National Congress.
July 29 » Adolf Hitler becomes leader of the National Socialist German Workers Party.
November 4 » Japanese Prime Minister Hara Takashi is assassinated in Tokyo.
Day of death March 9, 1987
The temperature on March 9, 1987 was between -4.5 °C and 3.7 °C and averaged -0.9 °C. There was 9.1 hours of sunshine (80%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
In The Netherlands , there was from Tuesday, November 4, 1986 to Tuesday, November 7, 1989 the cabinet Lubbers II, with Drs. R.F.M. Lubbers (CDA) as prime minister.
February 23 » Supernova 1987a is seen in the Large Magellanic Cloud.
May 9 » LOT Flight 5055 Tadeusz Kościuszko crashes after takeoff in Warsaw, Poland, killing all 183 people on board.
June 12 » The Central African Republic's former emperor Jean-Bédel Bokassa is sentenced to death for crimes he had committed during his 13-year rule.
June 28 » For the first time in military history, a civilian population is targeted for chemical attack when Iraqi warplanes bombed the Iranian town of Sardasht.
October 1 » The 5.9 Mw Whittier Narrows earthquake shakes the San Gabriel Valley with a Mercalli intensity of VIII (Severe), killing eight and injuring 200.
November 25 » Typhoon Nina pummels the Philippines with category 5 winds of 165mph and a surge that destroys entire villages. At least 1,036 deaths are attributed to the storm.
When copying data from this family tree, please include a reference to the origin: Guido Davus , "Jannis family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-jannis/I445.php : accessed January 30, 2026), "Maria Boons (1897-1987)".
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