January 30 » The first Anglo-Japanese Alliance is signed in London.
April 14 » James Cash Penney opens his first store in Kemmerer, Wyoming.
April 18 » The 7.5 Mw Guatemala earthquake shakes Guatemala with a maximum Mercalli intensity of VIII (Severe), killing between 800–2,000.
April 20 » Pierre and Marie Curie refine radium chloride.
June 24 » King Edward VII of the United Kingdom develops appendicitis, delaying his coronation.
August 9 » Edward VII and Alexandra of Denmark are crowned King and Queen of the United Kingdom of Great Britain and Ireland.
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.
March 1 » The Australian cricket team captained by Warwick Armstrong becomes the first team to complete a whitewash of The Ashes, something that would not be repeated for 86 years.
April 2 » The Autonomous Government of Khorasan, a military government encompassing the modern state of Iran, is established.
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.
June 15 » Bessie Coleman earns her pilot's license, becoming the first female pilot of African-American descent.
July 22 » Rif War: The Spanish Army suffers its worst military defeat in modern times to the Berbers of the Rif region of Spanish Morocco.
Day of death August 7, 1986
The temperature on August 7, 1986 was between 14.1 °C and 20.7 °C and averaged 17.4 °C. There was -0.1 mm of rain. There was 6.0 hours of sunshine (39%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) 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.
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.
January 19 » The first IBM PC computer virus is released into the wild. A boot sector virus dubbed (c)Brain, it was created by the Farooq Alvi Brothers in Lahore, Pakistan, reportedly to deter unauthorized copying of the software they had written.
March 15 » Collapse of Hotel New World: Thirty-three people die when the Hotel New World in Singapore collapses.
August 31 » Aeroméxico Flight 498 collides with a Piper PA-28 Cherokee over Cerritos, California, killing 67 in the air and 15 on the ground.
September 5 » Pan Am Flight 73 from Mumbai, India with 358 people on board is hijacked at Karachi International Airport.
November 6 » Sumburgh disaster: A British International Helicopters Boeing 234LR Chinook crashes 2⁄2 miles east of Sumburgh Airport killing 45 people. It is the deadliest civilian helicopter crash on record.
December 23 » Voyager, piloted by Dick Rutan and Jeana Yeager, lands at Edwards Air Force Base in California becoming the first aircraft to fly non-stop around the world without aerial or ground refueling.
When copying data from this family tree, please include a reference to the origin: Tjitze Koster, "Family tree Koster Twijslerheide e.o.", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koster/I420.php : accessed February 12, 2026), "Aafke Koster (1902-1986)".
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