The temperature on October 15, 1921 was between 3.2 °C and 16.5 °C and averaged 9.7 °C. There was 4.4 hours of sunshine (41%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west-southwest. 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.
January 16 » The Marxist Left in Slovakia and the Transcarpathian Ukraine holds its founding congress in Ľubochňa.
February 22 » After Russian forces under Baron Roman von Ungern-Sternberg drive the Chinese out, the Bogd Khan is reinstalled as the emperor of Mongolia.
March 24 » The 1921 Women's Olympiad begins in Monte Carlo, first international women's sports event.
April 2 » The Autonomous Government of Khorasan, a military government encompassing the modern state of Iran, is established.
August 28 » The Red Army dissolved the Free Territory, after driving the Black Army out of Ukraine.
October 18 » The Crimean Autonomous Soviet Socialist Republic is formed as part of the Russian Soviet Federative Socialist Republic.
Day of marriage August 21, 1945
The temperature on August 21, 1945 was between 11.5 °C and 18.0 °C and averaged 15.1 °C. There was 6.3 mm of rain during 4.3 hours. There was 0.2 hours of sunshine (1%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south. 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).
March 29 » World War II: Last day of V-1 flying bomb attacks on England.
April 9 » World War II: The Battle of Königsberg, in East Prussia, ends.
April 18 » Over 1,000 bombers attack the small island of Heligoland, Germany.
April 27 » World War II: The last German formations withdraw from Finland to Norway. The Lapland War and thus, World War II in Finland, comes to an end and the Raising the Flag on the Three-Country Cairn photograph is taken.
October 21 » French women vote for the first time during the 1945 French legislative election.
December 24 » Five of nine children become missing after their home in Fayetteville, West Virginia, is burned down.
Day of death September 16, 1975
The temperature on September 16, 1975 was between 10.6 °C and 21.3 °C and averaged 15.9 °C. There was 8.5 hours of sunshine (67%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
May 28 » Fifteen West African countries sign the Treaty of Lagos, creating the Economic Community of West African States.
July 5 » Cape Verde gains its independence from Portugal.
August 20 » Viking program: NASA launches the Viking 1 planetary probe toward Mars.
August 27 » The Governor of Portuguese Timor abandons its capital, Dili, and flees to Atauro Island, leaving control to a rebel group.
November 14 » With the signing of the Madrid Accords, Spain abandons Western Sahara.
November 27 » The Provisional IRA assassinates Ross McWhirter, after a press conference in which McWhirter had announced a reward for the capture of those responsible for multiple bombings and shootings across England.
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/I423.php : accessed March 6, 2026), "Pieter de Graaf (1921-1975)".
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