The temperature on January 13, 1889 was about -1.2 °C. The air pressure was 6 kgf/m2 and came mainly from the northeast. The airpressure was 76 cm mercury. The atmospheric humidity was 98%. Source: KNMI
January 8 » Herman Hollerith is issued US patent #395,791 for the 'Art of Applying Statistics' — his punched card calculator.
January 30 » Archduke Crown Prince Rudolf of Austria, heir to the Austro-Hungarian crown, is found dead with his mistress Baroness Mary Vetsera in the Mayerling.
February 22 » President Grover Cleveland signs a bill admitting North Dakota, South Dakota, Montana and Washington as U.S. states.
April 1 » The University of Northern Colorado was established, as the Colorado State Normal School.
May 11 » An attack upon a U.S. Army paymaster and escort results in the theft of over $28,000 and the award of two Medals of Honor.
November 15 » Brazil is declared a republic by Marshal Deodoro da Fonseca as Emperor Pedro II is deposed in a military coup.
Day of marriage May 30, 1914
The temperature on May 30, 1914 was between 6.2 °C and 18.5 °C and averaged 12.9 °C. There was 6.2 hours of sunshine (38%). The average windspeed was 2 Bft (weak wind) 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.
July 18 » The U.S. Congress forms the Aviation Section, U.S. Signal Corps, giving official status to aircraft within the U.S. Army for the first time.
August 2 » The German occupation of Luxembourg during World War I begins.
September 3 » French composer Albéric Magnard is killed defending his estate against invading German soldiers.
October 29 » Ottoman entry into World War I.
December 25 » A series of unofficial truces occur across the Western Front to celebrate Christmas.
Day of death April 13, 1965
The temperature on April 13, 1965 was between 1.4 °C and 10.7 °C and averaged 6.5 °C. There was 0.6 mm of rain during 0.6 hours. There was 7.7 hours of sunshine (56%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
January 1 » The People's Democratic Party of Afghanistan is founded in Kabul, Afghanistan.
May 27 » Vietnam War: American warships begin the first bombardment of National Liberation Front targets within South Vietnam.
August 18 » Vietnam War: Operation Starlite begins: United States Marines destroy a Viet Cong stronghold on the Van Tuong peninsula in the first major American ground battle of the war.
October 4 » Pope Paul VI begins the first papal visit to the Americas.
November 9 » Several U.S. states and parts of Canada are hit by a series of blackouts lasting up to 13 hours in the Northeast blackout of 1965.
December 7 » Pope Paul VI and Patriarch Athenagoras I simultaneously revoke mutual excommunications that had been in place since 1054.
When copying data from this family tree, please include a reference to the origin: Peter Keesman, "Family tree Keesman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-keesman/I4682.php : accessed February 15, 2026), "Pieter Hartog (1889-1965)".
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