The temperature on September 13, 1910 was between 7.8 °C and 13.6 °C and averaged 11.1 °C. There was 23.8 mm of rain. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
March 1 » The deadliest avalanche in United States history buries a Great Northern Railway train in northeastern King County, Washington, killing 96 people.
March 3 » Rockefeller Foundation: John D. Rockefeller Jr. announces his retirement from managing his businesses so that he can devote all his time to philanthropy.
May 31 » The South Africa Act comes into force, establishing the Union of South Africa.
July 15 » In his book Clinical Psychiatry, Emil Kraepelin gives a name to Alzheimer's disease, naming it after his colleague Alois Alzheimer.
October 14 » English aviator Claude Grahame-White lands his aircraft on Executive Avenue near the White House in Washington, D.C.
November 20 » Mexican Revolution: Francisco I. Madero issues the Plan de San Luis Potosí, denouncing Mexican President Porfirio Díaz, calling for a revolution to overthrow the government of Mexico, effectively starting the Mexican Revolution.
Day of death November 28, 1989
The temperature on November 28, 1989 was between -1.5 °C and 9.0 °C and averaged 4.8 °C. There was -0.1 mm of rain. There was 7.5 hours of sunshine (91%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northeast. 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.
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.
April 9 » Tbilisi massacre: an anti-Soviet peaceful demonstration and hunger strike in Tbilisi, demanding restoration of Georgian independence, is dispersed by the Soviet Army, resulting in 20 deaths and hundreds of injuries.
May 13 » Large groups of students occupy Tiananmen Square and begin a hunger strike.
August 19 » Polish president Wojciech Jaruzelski nominates Solidarity activist Tadeusz Mazowiecki to be the first non-communist prime minister in 42 years.
August 23 » Singing Revolution: Two million people from Estonia, Latvia and Lithuania stand on the Vilnius–Tallinn road, holding hands.
December 17 » Fernando Collor de Mello defeats Luiz Inácio Lula da Silva in the second round of the Brazilian presidential election, becoming the first democratically elected President in almost 30 years.
December 25 » Romanian Revolution: Deposed President of Romania Nicolae Ceaușescu and his wife, Elena, are condemned to death and executed after a summary trial.
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/I6630.php : accessed February 5, 2026), "Grietje Boorsma (1910-1989)".
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