The temperature on January 31, 1865 was about 1.3 °C. There was 1 mm of rain. The airpressure was 75 cm mercury. The atmospheric humidity was 98%. Source: KNMI
In The Netherlands , there was from February 1, 1862 to February 10, 1866 the cabinet Thorbecke II, with Mr. J.R. Thorbecke (liberaal) as prime minister.
March 29 » American Civil War: Federal forces under Major General Philip Sheridan move to flank Confederate forces under Robert E. Lee as the Appomattox Campaign begins.
April 1 » American Civil War: Union troops led by Philip Sheridan decisively defeat Confederate troops led by George Pickett, cutting the Army of Northern Virginia's last supply line.
April 20 » Astronomer Angelo Secchi demonstrates the Secchi disk, which measures water clarity, aboard Pope Pius IX's yacht, the L'Immaculata Concezion.
June 11 » The Naval Battle of the Riachuelo is fought on the rivulet Riachuelo (Argentina), between the Paraguayan Navy on one side and the Brazilian Navy on the other. The Brazilian victory was crucial for the later success of the Triple Alliance (Brazil, Uruguay, and Argentina) in the Paraguayan War.
June 23 » American Civil War: At Fort Towson in the Oklahoma Territory, Confederate Brigadier General Stand Watie surrenders the last significant Confederate army.
August 12 » Joseph Lister, British surgeon and scientist, performs 1st antiseptic surgery.
Day of marriage May 10, 1900
The temperature on May 10, 1900 was about 12.9 °C. The airpressure was 76 cm mercury. The atmospheric humidity was 52%. Source: KNMI
February 7 » Second Boer War: British troops fail in their third attempt to lift the Siege of Ladysmith.
March 13 » British forces occupy Bloemfontein, Orange Free State, during the Second Boer War.
May 17 » Second Boer War: British troops relieve Mafeking.
May 17 » The children's novel The Wonderful Wizard of Oz, by L. Frank Baum, is first published in the United States. The first copy is given to the author's sister.
June 20 » Boxer Rebellion: The Imperial Chinese Army begins a 55-day siege of the Legation Quarter in Beijing, China.
September 8 » Galveston hurricane: A powerful hurricane hits Galveston, Texas killing about 8,000 people.
Day of death May 18, 1943
The temperature on May 18, 1943 was between 6.4 °C and 18.5 °C and averaged 12.6 °C. There was 14.3 hours of sunshine (90%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
January 14 » World War II: Franklin D. Roosevelt and Winston Churchill begin the Casablanca Conference to discuss strategy and study the next phase of the war.
March 5 » First Flight of the Gloster Meteor, Britain's first combat jet aircraft.
May 14 » World War II: A Japanese submarine sinks AHSCentaur off the coast of Queensland.
May 17 » World War II: Dambuster Raids commence by No. 617 Squadron RAF.
June 20 » World War II: The Royal Air Force launches Operation Bellicose, the first shuttle bombing raid of the war. Lancaster bombers damage the V-2 rocket production facilities at the Zeppelin Works while en route to an air base in Algeria.
September 8 » World War II: The O.B.S. (German General Headquarters for the Mediterranean zone) is attacked in an air raid on Frascati.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I128983.php : accessed February 12, 2026), "Egbert Holtrop (1865-1943)".
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