February 9 » The Davis Cup competition is established.
May 24 » Second Boer War: The United Kingdom annexes the Orange Free State.
June 20 » Baron Eduard Toll, leader of the Russian Polar Expedition of 1900, departs Saint Petersburg in Russia on the explorer ship Zarya, never to return.
July 9 » The Governor of Shanxi province in North China orders the execution of 45 foreign Christian missionaries and local church members, including children.
October 19 » Max Planck discovers Planck's law of black-body radiation.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of marriage February 16, 1926
The temperature on February 16, 1926 was between 6.3 °C and 10.9 °C and averaged 8.5 °C. There was 6.1 mm of rain. There was 2.6 hours of sunshine (26%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 8 » Abdul-Aziz ibn Saud is crowned King of Hejaz.
April 21 » Al-Baqi cemetery, former site of the mausoleum of four Shi'a Imams, is leveled to the ground by Wahhabis.
August 5 » Harry Houdini performs his greatest feat, spending 91 minutes underwater in a sealed tank before escaping.
September 25 » The international Convention to Suppress the Slave Trade and Slavery is first signed.
October 14 » The children's book Winnie-the-Pooh, by A. A. Milne, is first published.
November 11 » The United States Numbered Highway System is established.
Day of death July 3, 1966
The temperature on July 3, 1966 was between 10.8 °C and 23.6 °C and averaged 17.9 °C. There was 2.1 mm of rain during 0.7 hours. There was 7.7 hours of sunshine (46%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Peter Ens, "Family tree Ens", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ens/I588.php : accessed March 6, 2026), "Hendrik Sicco Ens (1900-1966)".
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