The temperature on February 21, 1887 was about 3.3 °C. There was 0.3 mm of rain. The air pressure was 4 kgf/m2 and came mainly from the south. The airpressure was 76 cm mercury. The atmospheric humidity was 97%. 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.
June 8 » Herman Hollerith applies for US patent #395,781 for the 'Art of Compiling Statistics', which was his punched card calculator.
June 23 » The Rocky Mountains Park Act becomes law in Canada creating the nation's first national park, Banff National Park.
July 26 » Publication of the Unua Libro, founding the Esperanto movement.
September 5 » A fire at the Theatre Royal, Exeter, kills 186.
November 9 » The United States receives rights to Pearl Harbor, Hawaii.
November 13 » Bloody Sunday clashes in central London.
Day of marriage April 25, 1914
The temperature on April 25, 1914 was between 4.6 °C and 12.6 °C and averaged 8.5 °C. There was 9.7 hours of sunshine (67%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. 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 13 » Copyright: In New York City the American Society of Composers, Authors and Publishers is established to protect the copyrighted musical compositions of its members.
April 24 » The Franck–Hertz experiment, a pillar of quantum mechanics, is presented to the German Physical Society.
June 28 » Archduke Franz Ferdinand of Austria and his wife Sophie are assassinated in Sarajevo; this is the casus belli of World War I.
August 6 » World War I: Serbia declares war on Germany; Austria declares war on Russia.
August 15 » A servant of American architect Frank Lloyd Wright murders seven people and sets fire to the living quarters of Wright's Wisconsin home, Taliesin.
December 15 » A gas explosion at Mitsubishi Hōjō coal mine, in Kyushu, Japan, kills 687.
When copying data from this family tree, please include a reference to the origin: Gert Jonker, "Family tree Jonker", database, Genealogy Online (https://www.genealogieonline.nl/jonker_stamboom/I18312.php : accessed February 17, 2026), "Jentien Jonker (1887-????)".
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