The temperature on April 2, 1921 was between 4.8 °C and 17.3 °C and averaged 9.9 °C. There was 6.4 hours of sunshine (49%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. 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 12 » Acting to restore confidence in baseball after the Black Sox Scandal, Judge Kenesaw Mountain Landis is elected as Major League Baseball's first commissioner.
February 15 » Kingdom of Romania establishes its legation in Helsinki.
March 31 » The Royal Australian Air Force is formed.
July 2 » World War I: U.S. President Warren G. Harding signs the Knox–Porter Resolution formally ending the war between the United States and Germany.
September 21 » A storage silo in Oppau, Germany, explodes, killing 500–600 people.
November 4 » Japanese Prime Minister Hara Takashi is assassinated in Tokyo.
Day of marriage August 8, 1942
The temperature on August 8, 1942 was between 12.1 °C and 22.0 °C and averaged 17.2 °C. There was 0.1 mm of rain during 0.1 hours. There was 0.3 hours of sunshine (2%). The average windspeed was 3 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.
January 26 » World War II: The first United States forces arrive in Europe landing in Northern Ireland.
February 2 » The Osvald Group is responsible for the first, active event of anti-Nazi resistance in Norway, to protest the inauguration of Vidkun Quisling.
February 15 » World War II: Fall of Singapore. Following an assault by Japanese forces, the British General Arthur Percival surrenders. About 80,000 Indian, United Kingdom and Australian soldiers become prisoners of war, the largest surrender of British-led military personnel in history.
May 8 » World War II: The German 11th Army begins Operation Trappenjagd (Bustard Hunt) and destroys the bridgehead of the three Soviet armies defending the Kerch Peninsula.
May 19 » World War II: In the aftermath of the Battle of the Coral Sea, Task Force 16 heads to Pearl Harbor.
June 23 » World War II: Germany's latest fighter aircraft, a Focke-Wulf Fw 190, is captured intact when it mistakenly lands at RAF Pembrey in Wales.
Day of death April 11, 1970
The temperature on April 11, 1970 was between 1.2 °C and 8.3 °C and averaged 4.5 °C. There was 4.8 mm of rain during 4.1 hours. There was 1.4 hours of sunshine (10%). The heavily clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the south. Source: KNMI
January 1 » The defined beginning of Unix time, at 00:00:00.
April 13 » An oxygen tank aboard the Apollo 13 Service Module explodes, putting the crew in great danger and causing major damage to the Apollo command and service module (codenamed "Odyssey") while en route to the Moon.
May 11 » The 1970 Lubbock tornado kills 26 and causes $250million in damage.
August 26 » A new feminist movement leads a nationwide Women's Strike for Equality.
September 7 » Fighting begins between Arab guerrillas and government forces in Jordan.
December 23 » The North Tower of the World Trade Center in Manhattan, New York, New York is topped out at 1,368 feet (417m), making it the tallest building in the world.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I296468.php : accessed February 17, 2026), "Derk de Klein (1921-1970)".
Copy warning
Genealogical publications are copyright protected. Although data is often retrieved from public archives, the searching, interpreting, collecting, selecting and sorting of the data results in a unique product. Copyright protected work may not simply be copied or republished.
Please stick to the following rules
Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
Do not use this data until you have checked it, preferably at the source (the archives).
State from whom you have copied the data and ideally also his/her original source.