The temperature on July 13, 1921 was between 7.9 °C and 22.1 °C and averaged 15.8 °C. There was 14.6 hours of sunshine (89%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
March 8 » Spanish Prime Minister Eduardo Dato Iradier is assassinated while exiting the parliament building in Madrid.
April 11 » Emir Abdullah establishes the first centralised government in the newly created British protectorate of Transjordan.
May 19 » The United States Congress passes the Emergency Quota Act establishing national quotas on immigration.
July 11 » The Red Army captures Mongolia from the White Army and establishes the Mongolian People's Republic.
September 11 » Nahalal, the first moshav in Palestine, is settled as part of a Zionist plan of creating a Jewish state, later to be Israel.
October 18 » The Crimean Autonomous Soviet Socialist Republic is formed as part of the Russian Soviet Federative Socialist Republic.
Day of marriage December 30, 1942
The temperature on December 30, 1942 was between -1.0 °C and 4.3 °C and averaged 1.6 °C. There was 2.9 mm of rain during 2.3 hours. There was 1.8 hours of sunshine (23%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. 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.
February 20 » Lieutenant Edward O'Hare becomes America's first World War II flying ace.
February 27 » World War II: During the Battle of the Java Sea, an Allied strike force is defeated by a Japanese task force in the Java Sea in the Dutch East Indies.
March 5 » World War II: Japanese forces capture Batavia, capital of Dutch East Indies, which is left undefended after the withdrawal of the KNIL garrison and Australian Blackforce battalion to Buitenzorg and Bandung.
March 31 » World War II: Japanese forces invade Christmas Island, then a British possession.
May 7 » World War II: During the Battle of the Coral Sea, United States Navy aircraft carrier aircraft attack and sink the Imperial Japanese Navy light aircraft carrier Shōhō; the battle marks the first time in naval history that two enemy fleets fight without visual contact between warring ships.
September 26 » Holocaust: Senior SS official August Frank issues a memorandum detailing how Jews should be "evacuated".
Day of death June 15, 1961
The temperature on June 15, 1961 was between 2.1 °C and 19.0 °C and averaged 12.2 °C. There was 12.0 hours of sunshine (72%). The partly clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the ??. Source: KNMI
February 3 » The United States Air Forces begins Operation Looking Glass, and over the next 30 years, a "Doomsday Plane" is always in the air, with the capability of taking direct control of the United States' bombers and missiles in the event of the destruction of the SAC's command post.
February 12 » The Soviet Union launches Venera 1 towards Venus.
June 19 » Kuwait declares independence from the United Kingdom.
July 12 » Indian city Pune floods due to failure of the Khadakwasla and Panshet dams, killing at least two thousand people.
October 30 » The Soviet Union detonates the Tsar Bomba, the most powerful explosive device ever detonated.
December 31 » RTÉ, Ireland's state broadcaster, launches its first national television service.
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/I20780.php : accessed February 5, 2026), "Johanna Maria van Heerde (1921-1961)".
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