The temperature on February 19, 1887 was about 4.2 °C. There was 0.4 mm of rain. The air pressure was 12 kgf/m2 and came mainly from the north-northwest. The airpressure was 76 cm mercury. The atmospheric humidity was 85%. 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.
June 8 » Herman Hollerith applies for US patent #395,781 for the 'Art of Compiling Statistics', which was his punched card calculator.
June 18 » The Reinsurance Treaty between Germany and Russia is signed.
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.
November 9 » The United States receives rights to Pearl Harbor, Hawaii.
Day of marriage May 30, 1917
The temperature on May 30, 1917 was between 9.6 °C and 19.8 °C and averaged 14.8 °C. There was 8.8 hours of sunshine (54%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. 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.
January 19 » Silvertown explosion: A blast at a munitions factory in London kills 73 and injures over 400. The resulting fire causes over £2,000,000 worth of damage.
March 15 » Tsar Nicholas II of Russia abdicates the Russian throne ending the 304-year Romanov dynasty.
July 20 » World War I: The Corfu Declaration, which leads to the creation of the post-war Kingdom of Yugoslavia, is signed by the Yugoslav Committee and Kingdom of Serbia.
November 2 » The Military Revolutionary Committee of the Petrograd Soviet, in charge of preparation and carrying out the Russian Revolution, holds its first meeting.
November 28 » The Estonian Provincial Assembly declares itself the sovereign power of Estonia.
December 18 » The resolution containing the language of the Eighteenth Amendment to enact Prohibition is passed by the United States Congress.
When copying data from this family tree, please include a reference to the origin: P.M. Baert, "Family tree Baert", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-baert/I2348.php : accessed February 18, 2026), "Petrus Leopoldus Wilhelmus de Caluwe (1887-????)".
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