The temperature on August 11, 1889 was about 12.5 °C. There was 6 mm of rain. The air pressure was 2 kgf/m2 and came mainly from the south-southwest. The airpressure was 75 cm mercury. The atmospheric humidity was 94%. Source: KNMI
January 8 » Herman Hollerith is issued US patent #395,791 for the 'Art of Applying Statistics' — his punched card calculator.
February 11 » Meiji Constitution of Japan is adopted.
March 31 » The Eiffel Tower is officially opened.
May 6 » The Eiffel Tower is officially opened to the public at the Universal Exposition in Paris.
June 26 » Bangui is founded by Albert Dolisie and Alfred Uzac in what was then the upper reaches of the French Congo.
November 2 » North Dakota and South Dakota are admitted as the 39th and 40th U.S. states.
Day of marriage February 16, 1917
The temperature on February 16, 1917 was between -5.8 °C and 4.8 °C and averaged -1.0 °C. There was 8.2 hours of sunshine (82%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. 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.
April 12 » World War I: Canadian forces successfully complete the taking of Vimy Ridge from the Germans.
October 15 » World War I: Dutch dancer Mata Hari is executed by France for espionage.
November 7 » The Gregorian calendar date of the October Revolution, which gets its name from the Julian calendar date of 25 October. On this date in 1917, the Bolsheviks storm the Winter Palace.
November 25 » World War I: German forces defeat Portuguese army of about 1,200 at Negomano on the border of modern-day Mozambique and Tanzania.
December 2 » World War I: Russia and the Central Powers sign an armistice at Brest-Litovsk, and peace talks leading to the Treaty of Brest-Litovsk begin.
December 6 » Halifax Explosion: A munitions explosion near Halifax, Nova Scotia kills more than 1,900 people in the largest artificial explosion up to that time.
Day of death April 11, 1972
The temperature on April 11, 1972 was between 3.1 °C and 11.7 °C and averaged 6.5 °C. There was 2.4 mm of rain during 2.3 hours. There was 2.9 hours of sunshine (21%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
In The Netherlands , there was from April 5, 1967 to Tuesday, July 6, 1971 the cabinet Biesheuvel I, with Mr. B.W. Biesheuvel (ARP) as prime minister.
In The Netherlands , there was from Thursday, July 20, 1972 to Friday, May 11, 1973 the cabinet Biesheuvel II, with Mr. B.W. Biesheuvel (ARP) as prime minister.
February 10 » Ras Al Khaimah joins the United Arab Emirates, now making up seven emirates.
March 1 » The Thai province of Yasothon is created after being split off from the Ubon Ratchathani Province.
May 13 » The Troubles: A car bombing outside a crowded pub in Belfast sparks a two-day gun battle involving the Provisional IRA, Ulster Volunteer Force and British Army. Seven people are killed and over 66 injured.
May 30 » The Angry Brigade goes on trial over a series of 25 bombings throughout the United Kingdom.
September 5 » Munich massacre: A Palestinian terrorist group called "Black September" attacks and takes hostage 11 Israeli athletes at the Munich Olympic Games. Two die in the attack and nine are murdered the following day.
December 19 » Apollo program: The last manned lunar flight, Apollo 17, crewed by Eugene Cernan, Ronald Evans, and Harrison Schmitt, returns to Earth.
When copying data from this family tree, please include a reference to the origin: Ronald van 't Hoff, "Family tree Van 't Hoff - Zondag - Bosch - de Zwaan - vd Kolk - Westhuis - Plomp", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-t-hoff/I6499.php : accessed March 1, 2026), "Willempje de Zwaan (1889-1972)".
Copy warning
Genealogical publications are copyright protected. Although data is often retrieved from public archives, the searching, interpreting, collecting, selecting and sorting of the data results in a unique product. Copyright protected work may not simply be copied or republished.
Please stick to the following rules
Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
Do not use this data until you have checked it, preferably at the source (the archives).
State from whom you have copied the data and ideally also his/her original source.