February 1 » Shinhan Bank, the oldest bank in South Korea, opens in Seoul.
May 26 » The original manuscript of William Bradford's history, "Of Plymouth Plantation" is returned to the Governor of Massachusetts by the Bishop of London after being taken during the American Revolutionary War.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
July 2 » British-Italian engineer Guglielmo Marconi obtains a patent for radio in London.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
Day of marriage February 11, 1921
The temperature on February 11, 1921 was between -2.3 and 2.0 °C. There was 0.3 hours of sunshine (3%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north. 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 20 » The British K-class submarine HMS K5 sinks in the English Channel; all 56 on board die.
February 21 » Constituent Assembly of the Democratic Republic of Georgia adopts the country's first constitution.
May 19 » The United States Congress passes the Emergency Quota Act establishing national quotas on immigration.
June 28 » Serbian King Alexander I proclaims the new constitution of the Kingdom of Serbs, Croats and Slovenes, known thereafter as the Vidovdan Constitution.
July 29 » Adolf Hitler becomes leader of the National Socialist German Workers Party.
October 19 » The Portuguese Prime Minister and several officials are murdered in the Bloody Night coup.
Day of death October 28, 1942
The temperature on October 28, 1942 was between 6.8 °C and 13.1 °C and averaged 10.3 °C. There was 1.4 mm of rain during 2.2 hours. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. 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.
January 2 » World War II: Manila is captured by Japanese forces, enabling them to control the Philippines.
February 11 » World War II: Second day of the Battle of Bukit Timah is fought in Singapore.
August 15 » World War II: Operation Pedestal: The oil tanker SSOhio reaches the island of Malta barely afloat carrying vital fuel supplies for the island's defenses.
September 23 » World War II: The Matanikau action on Guadalcanal begins: U.S. Marines attack Japanese units along the Matanikau River.
October 1 » World War II: USSGrouper torpedoes Lisbon Maru, not knowing that she is carrying British prisoners of war from Hong Kong.
October 26 » World War II: In the Battle of the Santa Cruz Islands during the Guadalcanal Campaign, one U.S. aircraft carrier is sunk and another carrier is heavily damaged, while two Japanese carriers and one cruiser are heavily damaged.
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/I5685.php : accessed March 15, 2026), "Albertus Jonkers (1897-1942)".
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