The temperature on February 23, 1887 was about 7.8 °C. The air pressure was 38 kgf/m2 and came mainly from the south-southwest. The airpressure was 77 cm mercury. The atmospheric humidity was 83%. Source: KNMI
In The Netherlands , there was from April 23, 1884 to April 21, 1888 the cabinet Heemskerk, with Mr. J. Heemskerk Azn. (conservatief) as prime minister.
January 20 » The United States Senate allows the Navy to lease Pearl Harbor as a naval base.
April 4 » Argonia, Kansas elects Susanna M. Salter as the first female mayor in the United States.
June 8 » Herman Hollerith applies for US patent #395,781 for the 'Art of Compiling Statistics', which was his punched card calculator.
June 18 » The Reinsurance Treaty between Germany and Russia is signed.
July 6 » David Kalākaua, monarch of the Kingdom of Hawaii, is forced to sign the Bayonet Constitution, which transfers much of the king's authority to the Legislature of the Kingdom of Hawaii.
November 13 » Bloody Sunday clashes in central London.
Day of marriage October 29, 1914
The temperature on October 29, 1914 was between 5.7 °C and 9.9 °C and averaged 8.4 °C. There was 3.9 mm of rain. There was 0.3 hours of sunshine (3%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
June 23 » Mexican Revolution: Pancho Villa takes Zacatecas from Victoriano Huerta.
September 3 » World War I: Start of the Battle of Grand Couronné, a German assault against French positions on high ground near the city of Nancy.
October 19 » First World War: The First Battle of Ypres begins.
December 14 » Lisandro de la Torre and others found the Democratic Progressive Party (Partido Demócrata Progresista, PDP) at the Hotel Savoy, Buenos Aires, Argentina.
December 15 » A gas explosion at Mitsubishi Hōjō coal mine, in Kyushu, Japan, kills 687.
December 24 » World War I: The "Christmas truce" begins.
Day of death May 31, 1962
The temperature on May 31, 1962 was between 3.2 °C and 12.3 °C and averaged 8.8 °C. There was 12.3 hours of sunshine (75%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
February 8 » Charonne massacre. Nine trade unionists are killed by French police at the instigation of Nazi collaborator Maurice Papon, then chief of the Paris Prefecture of Police.
February 20 » Mercury program: While aboard Friendship 7, John Glenn becomes the first American to orbit the earth, making three orbits in four hours, 55 minutes.
May 22 » Continental Airlines Flight 11 crashes after bombs explode on board.
June 7 » The Organisation Armée Secrète (OAS) sets fire to the University of Algiers library building, destroying about 500,000 books.
October 3 » Project Mercury: Wally Schirra in Sigma 7 launched from Cape Canaveral for a six-orbit flight.
December 25 » The Soviet Union conducts its final above-ground nuclear weapon test, in anticipation of the 1963 Partial Nuclear Test Ban Treaty.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I345441.php : accessed February 25, 2026), "Wanderdina Pottgieters (1887-1962)".
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