January 10 » The first great Texas oil gusher is discovered at Spindletop in Beaumont, Texas.
June 17 » The College Board introduces its first standardized test, the forerunner to the SAT.
August 10 » The U.S. Steel recognition strike by the Amalgamated Association of Iron and Steel Workers begins.
August 28 » Silliman University is founded in the Philippines. It is the first American private school in the country.
October 29 » Leon Czolgosz, the assassin of U.S. President William McKinley, is executed by electrocution.
November 27 » The U.S. Army War College is established.
Day of marriage September 23, 1931
The temperature on September 23, 1931 was between 3.2 °C and 14.2 °C and averaged 9.0 °C. There was 7.7 hours of sunshine (63%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
February 13 » The British Raj completes its transfer from Calcutta to New Delhi.
March 11 » Ready for Labour and Defence of the USSR, abbreviated as GTO, is introduced in the Soviet Union.
March 26 » Ho Chi Minh Communist Youth Union is founded in Vietnam.
March 31 » An earthquake in Nicaragua destroys Managua; killing 2,000.
July 16 » Emperor Haile Selassie signs the first constitution of Ethiopia.
August 24 » France and the Soviet Union sign a neutrality pact.
Day of death May 25, 1980
The temperature on May 25, 1980 was between 7.4 °C and 14.8 °C and averaged 11.3 °C. There was 0.3 mm of rain during 0.2 hours. There was 1.8 hours of sunshine (11%). The heavily clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
January 21 » Iran Air Flight 291 crashes in the Alborz Mountains while on approach to Mehrabad International Airport in Tehran, Iran, killing 128 people.
April 18 » The Republic of Zimbabwe (formerly Rhodesia) comes into being, with Canaan Banana as the country's first President. The Zimbabwean dollar replaces the Rhodesian dollar as the official currency.
June 3 » The 1980 Grand Island tornado outbreak hits Nebraska, causing five deaths and $300million (equivalent to $931million in 2019) worth of damage.
July 19 » Opening of the Summer Olympics in Moscow.
October 2 » Michael Myers becomes the first member of either chamber of Congress to be expelled since the Civil War.
November 20 » Lake Peigneur drains into an underlying salt deposit. A misplaced Texaco oil probe had been drilled into the Diamond Crystal Salt Mine, causing water to flow down into the mine, eroding the edges of the hole.
When copying data from this family tree, please include a reference to the origin: Olaf Andersen, "Andersen family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-andersen/I5881.php : accessed January 31, 2026), "Hilgonda de Pater (1901-1980)".
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