The temperature on July 2, 1918 was between 9.8 °C and 22.1 °C and averaged 15.8 °C. There was 12.6 hours of sunshine (76%). The average windspeed was 4 Bft (moderate breeze) 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.
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 26 » Finnish Civil War: A group of Red Guards hangs a red lantern atop the tower of Helsinki Workers' Hall to symbolically mark the start of the war.
February 3 » The Twin Peaks Tunnel in San Francisco, California begins service as the longest streetcar tunnel in the world at 11,920 feet (3,633 meters) long.
April 1 » The Royal Air Force is created by the merger of the Royal Flying Corps and the Royal Naval Air Service.
April 23 » World War I: The British Royal Navy makes a raid in an attempt to neutralise the Belgian port of Bruges-Zeebrugge.
October 30 » World War I: The Ottoman Empire signs the Armistice of Mudros with the Allies.
November 27 » The Free Territory of Ukraine is established in Huliaipole.
Day of marriage April 14, 1943
The temperature on April 14, 1943 was between 6.8 °C and 19.7 °C and averaged 13.7 °C. There was 1.7 hours of sunshine (12%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. 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 23 » World War II: Troops of the British Eighth Army capture Tripoli in Libya from the German–Italian Panzer Army.
April 19 » Albert Hofmann deliberately doses himself with LSD for the first time, three days after having discovered its effects on April 16.
May 16 » The Holocaust: The Warsaw Ghetto Uprising ends.
May 30 » The Holocaust: Josef Mengele becomes chief medical officer of the Zigeunerfamilienlager (Romani family camp) at Auschwitz concentration camp.
June 1 » BOAC Flight 777 is shot down over the Bay of Biscay by German Junkers Ju 88s, killing British actor Leslie Howard and leading to speculation that it was actually an attempt to kill British Prime Minister Winston Churchill.
June 20 » World War II: The Royal Air Force launches Operation Bellicose, the first shuttle bombing raid of the war. Lancaster bombers damage the V-2 rocket production facilities at the Zeppelin Works while en route to an air base in Algeria.
Day of death May 15, 1945
The temperature on May 15, 1945 was between 9.1 °C and 17.0 °C and averaged 13.6 °C. There was 10.6 hours of sunshine (68%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. 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).
January 20 » World War II: Germany begins the evacuation of 1.8million people from East Prussia, a task which will take nearly two months.
March 22 » World War II: The city of Hildesheim, Germany heavily damaged in a British air raid, though it had little military significance and Germany was on the verge of final defeat.
April 12 » World War II: The U.S. Ninth Army under General William H. Simpson crosses the Elbe River astride Magdeburg, and reached Tangermünde—only 50 miles from Berlin.
May 2 » World War II: The Soviet Union announces the fall of Berlin.
May 5 » World War II: Dönitz gives Löhr permission to seek an armistice with the Western Allies to preserve a communist free Austria and recognising first, from a German standpoint, the separation of Austria from Germany undoing the Anschluss.
July 16 » Manhattan Project: The Atomic Age begins when the United States successfully detonates a plutonium-based test nuclear weapon near Alamogordo, New Mexico.
Day of burial May 18, 1945
The temperature on May 18, 1945 was between 9.2 °C and 19.4 °C and averaged 14.5 °C. There was 11.5 hours of sunshine (73%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the 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.
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).
February 14 » World War II: Navigational error leads to the mistaken bombing of Prague, Czechoslovakia by an American squadron of B-17s assisting in the Soviet's Vistula–Oder Offensive.
April 14 » Razing of Friesoythe: The 4th Canadian (Armoured) Division deliberately destroyed the German town of Friesoythe on the orders of Major General Christopher Vokes.
April 15 » Bergen-Belsen concentration camp is liberated.
May 7 » World War II: General Alfred Jodl signs unconditional surrender terms at Reims, France, ending Germany's participation in the war. The document takes effect the next day.
June 26 » The United Nations Charter is signed by 50 Allied nations in San Francisco, California.
September 7 » World War II: Japanese forces on Wake Island, which they had held since December 1941, surrender to U.S. Marines.
When copying data from this family tree, please include a reference to the origin: Dirk Zwinderman, "Family tree Zwinderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-zwinderman/I5589.php : accessed February 14, 2026), "Jans Zwinderman (1918-1945)".
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