The temperature on April 18, 1915 was between -0.6 °C and 11.9 °C and averaged 6.1 °C. There was 11.5 hours of sunshine (82%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the 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.
March 20 » Albert Einstein publishes his general theory of relativity.
May 23 » World War I: Italy joins the Allies, fulfilling its part of the Treaty of London.
May 27 » HMS Princess Irene exploded and sank off Sheerness, Kent with the loss of 352 lives.
July 16 » Henry James becomes a British citizen to highlight his commitment to Britain during the first World War.
August 4 » World War I: The German 12th Army occupies Warsaw during the Gorlice–Tarnów Offensive and the Great Retreat of 1915.
August 6 » World War I: Battle of Sari Bair: The Allies mount a diversionary attack timed to coincide with a major Allied landing of reinforcements at Suvla Bay.
Day of marriage August 5, 1938
The temperature on August 5, 1938 was between 18.4 °C and 28.2 °C and averaged 22.5 °C. There was 20.0 mm of rain during 4.3 hours. There was 7.3 hours of sunshine (48%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
March 12 » Anschluss: German troops occupy and absorb Austria.
March 18 » Mexico creates Pemex by expropriating all foreign-owned oil reserves and facilities.
September 12 » Adolf Hitler demands autonomy and self-determination for the Germans of the Sudetenland region of Czechoslovakia.
September 30 » Britain, France, Germany and Italy sign the Munich Agreement, whereby Germany annexes the Sudetenland region of Czechoslovakia.
November 16 » LSD is first synthesized by Albert Hofmann from ergotamine at the Sandoz Laboratories in Basel.
Day of death February 23, 2000
The temperature on February 23, 2000 was between -1.5 °C and 10.0 °C and averaged 5.1 °C. There was -0.1 mm of rain. There was 5.8 hours of sunshine (56%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south. Source: KNMI
May 3 » The sport of geocaching begins, with the first cache placed and the coordinates from a GPS posted on Usenet.
June 7 » The United Nations defines the Blue Line as the border between Israel and Lebanon.
June 22 » Wuhan Airlines Flight 343 is struck by lightning and crashes into Wuhan's Hanyang District, killing 49 people.
October 2 » The Rijndael algorithm is chosen by NIST as the AES standard.
October 31 » Soyuz TM-31 launches, carrying the first resident crew to the International Space Station. The ISS has been crewed continuously since then.
November 26 » George W. Bush is certified the winner of Florida's electoral votes by Katherine Harris, going on to win the United States presidential election, despite losing in the national popular vote.
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/I14604.php : accessed February 7, 2026), "Nicolaas Hendrik Ravenhorst (1915-2000)".
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