The temperature on April 4, 1887 was about 13.6 °C. The air pressure was 30 kgf/m2 and came mainly from the southwest. The airpressure was 75 cm mercury. The atmospheric humidity was 56%. 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.
February 2 » In Punxsutawney, Pennsylvania the first Groundhog Day is observed.
April 10 » On Easter Sunday, Pope Leo XIII authorizes the establishment of the Catholic University of America.
July 4 » The founder of Pakistan, Quaid-i-Azam Muhammad Ali Jinnah, joins Sindh-Madrasa-tul-Islam, Karachi.
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.
October 1 » Balochistan is conquered by the British Empire.
November 13 » Bloody Sunday clashes in central London.
Day of marriage May 24, 1919
The temperature on May 24, 1919 was between 9.2 °C and 22.6 °C and averaged 16.0 °C. There was 9.6 hours of sunshine (60%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. 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.
January 18 » World War I: The Paris Peace Conference opens in Versailles, France.
February 14 » The Polish–Soviet War begins.
April 16 » Polish–Soviet War: The Polish army launches the Vilna offensive to capture Vilnius in modern Lithuania.
May 15 » Greek occupation of Smyrna. During the occupation, the Greek army kills or wounds 350 Turks; those responsible are punished by Greek commander Aristides Stergiades.
September 10 » Austria and the Allies sign the Treaty of Saint-Germain-en-Laye recognizing the independence of Poland, Hungary, Czechoslovakia and Yugoslavia.
October 16 » Adolf Hitler delivers his first public address at a meeting of the German Workers' Party.
Day of death February 21, 1943
The temperature on February 21, 1943 was between -1.9 °C and 2.9 °C and averaged 1.5 °C. There was 0.3 mm of rain. There was 0.2 hours of sunshine (2%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south east. 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 27 » World War II: The Eighth Air Force sorties ninety-one B-17s and B-24s to attack the U-boat construction yards at Wilhelmshaven, Germany. This was the first American bombing attack on Germany.
March 5 » First Flight of the Gloster Meteor, Britain's first combat jet aircraft.
September 14 » World War II: The Wehrmacht starts a three-day retaliatory operation targeting several Greek villages in the region of Viannos, whose death toll would eventually exceed 500 persons.
October 8 » World War II: Around 30 civilians are executed by Friedrich Schubert's paramilitary group in Kallikratis, Crete.
October 14 » World War II: Prisoners at the Sobibór extermination camp in Poland revolt against the Germans.
October 31 » World War II: An F4U Corsair accomplishes the first successful radar-guided interception by a United States Navy or Marine Corps aircraft.
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/I159489.php : accessed January 26, 2026), "Hendrika Siemerink (1887-1943)".
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