The temperature on January 20, 1876 was about 3.5 °C. The air pressure was 9 kgf/m2 and came mainly from the south-southwest. The airpressure was 76 cm mercury. The atmospheric humidity was 98%. Source: KNMI
From August 27, 1874 till November 3, 1877 the Netherlands had a cabinet Heemskerk - Van Lijnden van Sandenburg with the prime ministers Mr. J. Heemskerk Azn. (conservatief) and Mr. C.Th. baron Van Lijnden van Sandenburg (AR).
April 11 » The Benevolent and Protective Order of Elks is organized.
April 20 » The April Uprising begins. Its suppression shocks European opinion, and Bulgarian independence becomes a condition for ending the Russo-Turkish War.
April 22 » The first game in the history of the National League was played at the Jefferson Street Grounds in Philadelphia. This game is often pointed to as the beginning of Major League Baseball.
May 2 » The April Uprising breaks out in Ottoman Bulgaria.
May 10 » The Centennial Exposition is opened in Philadelphia.
August 1 » Colorado is admitted as the 38th U.S. state.
Day of marriage November 24, 1900
The temperature on November 24, 1900 was about 6.8 °C. The airpressure was 76 cm mercury. The atmospheric humidity was 85%. Source: KNMI
February 28 » The Second Boer War: The 118-day "Siege of Ladysmith" is lifted.
April 30 » Hawaii becomes a territory of the United States, with Sanford B. Dole as governor.
May 17 » Second Boer War: British troops relieve Mafeking.
June 17 » Boxer Rebellion: Western Allied and Japanese forces capture the Taku Forts in Tianjin, China.
July 27 » Kaiser Wilhelm II makes a speech comparing Germans to Huns; for years afterwards, "Hun" would be a disparaging name for Germans.
October 19 » Max Planck discovers Planck's law of black-body radiation.
Day of death October 20, 1961
The temperature on October 20, 1961 was between 5.5 °C and 10.9 °C and averaged 8.5 °C. There was 2.0 mm of rain during 1.0 hours. There was 1.0 hours of sunshine (10%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
January 3 » The SL-1 nuclear reactor is destroyed by a steam explosion in the only reactor incident in the United States to cause immediate fatalities.
January 31 » Project Mercury: Mercury-Redstone 2: Ham the Chimp travels into outer space.
April 12 » Cold War: Space Race: The Soviet cosmonaut Yuri Gagarin becomes the first human to travel into outer space and perform the first manned orbital flight, Vostok 1.
April 20 » Cold War: Failure of the Bay of Pigs Invasion of US-backed Cuban exiles against Cuba.
May 4 » Malcolm Ross and Victor Prather attain a new altitude record for manned balloon flight ascending in the Strato-Lab V open gondola to 113,740 feet (34.67km).
December 19 » India annexes Daman and Diu, part of Portuguese India.
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/I88763.php : accessed February 19, 2026), "Harm Bolt (1876-1961)".
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