The temperature on March 12, 1917 was between 2.5 °C and 8.4 °C and averaged 5.7 °C. There was 2.7 mm of rain. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. 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.
February 3 » First World War: The American entry into World War I begins when diplomatic relations with Germany are severed due to its unrestricted submarine warfare.
March 1 » The Zimmermann Telegram is reprinted in newspapers across the United States after the U.S. government releases its unencrypted text.
April 9 » World War I: The Battle of Arras: The battle begins with Canadian Corps executing a massive assault on Vimy Ridge.
July 17 » King George V issues a Proclamation stating that the male line descendants of the British Royal Family will bear the surname Windsor.
September 14 » The Russian Empire is formally replaced by the Russian Republic.
September 26 » World War I: The Battle of Polygon Wood begins.
Day of marriage April 13, 1940
The temperature on April 13, 1940 was between -0.3 °C and 10.4 °C and averaged 4.8 °C. There was 0.1 mm of rain. There was 10.6 hours of sunshine (77%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
June 3 » World War II: The Battle of Dunkirk ends with a German victory and with Allied forces in full retreat.
June 10 » World War II: U.S. President Franklin D. Roosevelt denounces Italy's actions in his "Stab in the Back" speech at the graduation ceremonies of the University of Virginia.
June 18 » The "Finest Hour" speech is delivered by Winston Churchill.
July 10 » World War II: Six days before Adolf Hitler issues his Directive 16 to the combined Wehrmacht armed forces for Operation Sea Lion, the Kanalkampf shipping attacks against British maritime convoys begin, in the leadup to initiating the Battle of Britain.
November 2 » World War II: First day of Battle of Elaia–Kalamas between the Greeks and the Italians.
December 14 » Plutonium (specifically Pu-238) is first isolated at Berkeley, California.
Day of death July 25, 1991
The temperature on July 25, 1991 was between 12.4 °C and 20.1 °C and averaged 15.7 °C. There was 0.8 mm of rain during 0.5 hours. There was 3.3 hours of sunshine (21%). The partly or heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south east. Source: KNMI
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.
July 10 » Boris Yeltsin takes office as the first elected President of Russia.
July 11 » Nigeria Airways Flight 2120 crashes in Jeddah, Saudi Arabia killing all 261 passengers and crew on board.
August 20 » Dissolution of the Soviet Union, August Coup: More than 100,000 people rally outside the Soviet Union's parliament building protesting the coup aiming to depose President Mikhail Gorbachev.
August 21 » Latvia declares renewal of its full independence after its occupation by the Soviet Union since 1940.
August 23 » The World Wide Web is opened to the public.
October 18 » The Supreme Council of Azerbaijan adopts a declaration of independence from the Soviet Union.
When copying data from this family tree, please include a reference to the origin: Ronald van 't Hoff, "Family tree Van 't Hoff - Zondag - Bosch - de Zwaan - vd Kolk - Westhuis - Plomp", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-t-hoff/I34167.php : accessed March 1, 2026), "Aalt Wolf (1917-1991)".
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