March 1 » Henri Becquerel discovers radioactive decay.
April 6 » In Athens, the opening of the first modern Olympic Games is celebrated, 1,500 years after the original games are banned by Roman emperor Theodosius I.
April 15 » Closing ceremony of the Games of the I Olympiad in Athens, Greece.
May 18 » Khodynka Tragedy: A mass panic on Khodynka Field in Moscow during the festivities of the coronation of Russian Tsar Nicholas II results in the deaths of 1,389 people.
September 21 » Anglo-Egyptian conquest of Sudan: British forces under the command of Horatio Kitchener take Dongola.
November 27 » Also sprach Zarathustra by Richard Strauss is first performed.
Day of marriage May 26, 1921
The temperature on May 26, 1921 was between 13.8 °C and 27.1 °C and averaged 18.2 °C. There was 5.0 mm of rain. There was 7.6 hours of sunshine (47%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south-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 20 » The British K-class submarine HMS K5 sinks in the English Channel; all 56 on board die.
March 6 » Portuguese Communist Party is founded as the Portuguese Section of the Communist International.
March 18 » The Kronstadt rebellion is suppressed by the Red Army.
March 19 » Irish War of Independence: One of the biggest engagements of the war takes place at Crossbarry, County Cork. About 100 Irish Republican Army (IRA) volunteers escape an attempt by over 1,300 British forces to encircle them.
September 21 » A storage silo in Oppau, Germany, explodes, killing 500–600 people.
November 14 » The Communist Party of Spain is founded, and issues the first edition of Mundo obrero.
Day of death April 16, 1972
The temperature on April 16, 1972 was between 4.7 °C and 7.7 °C and averaged 6.3 °C. There was 6.4 mm of rain during 9.1 hours. The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
In The Netherlands , there was from April 5, 1967 to Tuesday, July 6, 1971 the cabinet Biesheuvel I, with Mr. B.W. Biesheuvel (ARP) as prime minister.
In The Netherlands , there was from Thursday, July 20, 1972 to Friday, May 11, 1973 the cabinet Biesheuvel II, with Mr. B.W. Biesheuvel (ARP) as prime minister.
April 25 » Vietnam War: Nguyen Hue Offensive: The North Vietnamese 320th Division forces 5,000 South Vietnamese troops to retreat and traps about 2,500 others northwest of Kontum.
June 18 » Staines air disaster: One hundred eighteen people are killed when a BEA H.S. Trident crashes two minutes after take off from London's Heathrow Airport.
July 31 » The Troubles: In Operation Motorman, the British Army re-takes the urban no-go areas of Northern Ireland. It is the biggest British military operation since the Suez Crisis of 1956, and the biggest in Ireland since the Irish War of Independence. Later that day, nine civilians are killed by car bombs in the village of Claudy.
August 3 » The United States Senate ratifies the Anti-Ballistic Missile Treaty.
August 16 » In an unsuccessful coup d'état attempt, the Royal Moroccan Air Force fires upon Hassan II of Morocco's plane while he is traveling back to Rabat.
October 29 » The three surviving perpetrators of the Munich massacre are released from prison in exchange for the hostages of hijacked Lufthansa Flight 615.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I108803.php : accessed October 23, 2026), "Pieter van der Laan (1896-1972)".
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