The temperature on March 16, 1887 was about 2.1 °C. The air pressure was 49 kgf/m2 and came mainly from the east-northeast. The airpressure was 76 cm mercury. The atmospheric humidity was 47%. 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.
January 20 » The United States Senate allows the Navy to lease Pearl Harbor as a naval base.
February 23 » The French Riviera is hit by a large earthquake, killing around 2,000.
April 10 » On Easter Sunday, Pope Leo XIII authorizes the establishment of the Catholic University of America.
June 18 » The Reinsurance Treaty between Germany and Russia is signed.
July 6 » David Kalākaua, monarch of the Kingdom of Hawaii, is forced to sign the Bayonet Constitution, which transfers much of the king's authority to the Legislature of the Kingdom of Hawaii.
November 13 » Bloody Sunday clashes in central London.
Day of marriage September 18, 1912
The temperature on September 18, 1912 was between 9.4 °C and 13.7 °C and averaged 11.4 °C. There was 0.3 hours of sunshine (2%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
February 25 » Marie-Adélaïde, the eldest of six daughters of Guillaume IV, becomes the first reigning Grand Duchess of Luxembourg.
June 30 » The Regina Cyclone, Canada's deadliest tornado event, kills 28 people in Regina, Saskatchewan.
October 19 » Italo-Turkish War: Italy takes possession of what is now Libya from the Ottoman Empire.
October 24 » First Balkan War: The Battle of Kumanovo concludes with the Serbian victory against the Ottoman Empire.
December 6 » The Nefertiti Bust is discovered.
December 28 » The first municipally owned streetcars take to the streets in San Francisco.
Day of death June 18, 1945
The temperature on June 18, 1945 was between 6.4 °C and 21.9 °C and averaged 14.9 °C. There was 11.0 hours of sunshine (66%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
In The Netherlands , there was from February 23, 1945 to June 24, 1945 the cabinet Gerbrandy III, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
From June 24, 1945 till July 3, 1946 the Netherlands had a cabinet Schermerhorn - Drees with the prime ministers Prof. ir. W. Schermerhorn (VDB) and W. Drees (PvdA).
April 8 » World War II: After an air raid accidentally destroys a train carrying about 4,000 Nazi concentration camp internees in Prussian Hanover, the survivors are massacred by Nazis.
April 13 » World War II: German troops kill more than 1,000 political and military prisoners in Gardelegen, Germany.
August 11 » Poles in Kraków engage in a pogrom against Jews in the city, killing one and wounding five.
August 16 » The National Representatives' Congress, the precursor of the current National Assembly of Vietnam, convenes in Sơn Dương.
September 5 » Iva Toguri D'Aquino, a Japanese American suspected of being wartime radio propagandist Tokyo Rose, is arrested in Yokohama.
December 12 » The People's Republic of Korea is outlawed in the South, by order of the United States Army Military Government in Korea.
When copying data from this family tree, please include a reference to the origin: Hendrik de Graaf, "Family tree Plugboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plugboer/I18970.php : accessed February 15, 2026), "Christiaan van Heulen (1887-1945)".
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