February 1 » Shinhan Bank, the oldest bank in South Korea, opens in Seoul.
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.
May 26 » The original manuscript of William Bradford's history, "Of Plymouth Plantation" is returned to the Governor of Massachusetts by the Bishop of London after being taken during the American Revolutionary War.
July 26 » Anglo-Afghan War: The Pashtun fakir Saidullah leads an army of more than 10,000 to begin a siege of the British garrison in the Malakand Agency of the North West Frontier Province of India.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
Day of marriage October 20, 1921
The temperature on October 20, 1921 was between 11.9 °C and 17.9 °C and averaged 14.0 °C. There was 0.7 mm of rain. There was 0.3 hours of sunshine (3%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. 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 12 » Acting to restore confidence in baseball after the Black Sox Scandal, Judge Kenesaw Mountain Landis is elected as Major League Baseball's first commissioner.
March 8 » Spanish Prime Minister Eduardo Dato Iradier is assassinated while exiting the parliament building in Madrid.
March 18 » The second Peace of Riga is signed between Poland and the Soviet Union.
March 31 » The Royal Australian Air Force is formed.
August 23 » British airship R-38 experiences structural failure over Hull in England and crashes in the Humber Estuary. Of her 49 British and American training crew, only four survive.
October 19 » The Portuguese Prime Minister and several officials are murdered in the Bloody Night coup.
Day of death March 8, 1991
The temperature on March 8, 1991 was between 10.0 °C and 15.1 °C and averaged 12.0 °C. There was -0.1 mm of rain. The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south east. Source: KNMI
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
When copying data from this family tree, please include a reference to the origin: P. Heres, "Family tree Eilander", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eilander/I1099522598.php : accessed February 26, 2026), "Johanna de Groot (1897-1991)".
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