The temperature on June 20, 1890 was about 19.4 °C. The air pressure was 4 kgf/m2 and came mainly from the west-southwest. The airpressure was 76 cm mercury. The atmospheric humidity was 66%. Source: KNMI
January 1 » Eritrea is consolidated into a colony by the Italian government.
April 14 » The Pan-American Union is founded by the First International Conference of American States in Washington, D.C.
July 3 » Idaho is admitted as the 43rd U.S. state.
July 10 » Wyoming is admitted as the 44th U.S. state.
November 23 » King William III of the Netherlands dies without a male heir and a special law is passed to allow his daughter Princess Wilhelmina to succeed him.
December 29 » Wounded Knee Massacre on Pine Ridge Indian Reservation, 300 Lakota are killed by the United States 7th Cavalry Regiment.
Day of marriage October 30, 1919
The temperature on October 30, 1919 was between -2.7 °C and 6.2 °C and averaged 2.1 °C. There was 0.6 mm of rain. There was 3.7 hours of sunshine (38%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-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.
April 16 » Mohandas Gandhi organizes a day of "prayer and fasting" in response to the killing of Indian protesters in the Jallianwala Bagh massacre by the British colonial troops three days earlier.
May 1 » German troops enter Munich to suppress the Bavarian Soviet Republic.
June 7 » Sette Giugno: Nationalist riots break out in Valletta, the capital of Malta. British soldiers fire into the crowd, killing four people.
July 21 » The dirigible Wingfoot Air Express crashes into the Illinois Trust and Savings Building in Chicago, killing 12 people.
August 8 » The Anglo-Afghan Treaty of 1919 is signed. It establishes peaceful relations between Afghanistan and the UK, and confirms the Durand line as the mutual border. In return, the UK is no longer obligated to subsidize the Afghan government.
October 7 » KLM, the flag carrier of the Netherlands, is founded. It is the oldest airline still operating under its original name.
Day of death September 11, 1961
The temperature on September 11, 1961 was between 10.1 °C and 19.7 °C and averaged 14.7 °C. There was 0.2 mm of rain during 0.2 hours. There was 1.6 hours of sunshine (12%). The partly or heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southwest. Source: KNMI
May 24 » American civil rights movement: Freedom Riders are arrested in Jackson, Mississippi, for "disturbing the peace" after disembarking from their bus.
May 28 » Peter Benenson's article The Forgotten Prisoners is published in several internationally read newspapers. This will later be thought of as the founding of the human rights organization Amnesty International.
September 1 » The first conference of the Non-Aligned Countries is held in Belgrade, Yugoslavia.
September 12 » The African and Malagasy Union is founded.
September 18 » U.N. Secretary-General Dag Hammarskjöld dies in an air crash while attempting to negotiate peace in the Katanga region of the Democratic Republic of the Congo.
November 29 » Project Mercury: Mercury-Atlas 5 Mission: Enos, a chimpanzee, is launched into space. The spacecraft orbits the Earth twice and splashes down off the coast of Puerto Rico.
When copying data from this family tree, please include a reference to the origin: Elly Gelderman, "Family tree Gelderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-gelderman/I4583.php : accessed January 26, 2026), "Jacob Pieter Kelderman (1890-1961)".
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