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.
June 2 » Guglielmo Marconi applies for a patent for his wireless telegraph.
July 28 » The city of Miami, Florida is incorporated.
August 17 » Bridget Driscoll became the first recorded case of a pedestrian killed in a collision with a motor car in the United Kingdom.
August 27 » Anglo-Zanzibar War: The shortest war in world history (09:02 to 09:40), between the United Kingdom and Zanzibar.
September 21 » Anglo-Egyptian conquest of Sudan: British forces under the command of Horatio Kitchener take Dongola.
Day of marriage August 20, 1919
The temperature on August 20, 1919 was between 14.3 °C and 22.1 °C and averaged 18.2 °C. There was 4.6 mm of rain. There was 0.2 hours of sunshine (1%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the 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.
March 23 » In Milan, Italy, Benito Mussolini founds his Fascist political movement.
April 13 » Jallianwala Bagh massacre: British Indian Army troops lead by Brigadier-General Reginald Dyer killed approx 379-1000 unarmed demonstrators including men and women in Amritsar, India; and approximately 1,500 injured.
June 2 » Anarchists simultaneously set off bombs in eight separate U.S. cities.
June 7 » Sette Giugno: Nationalist riots break out in Valletta, the capital of Malta. British soldiers fire into the crowd, killing four people.
June 28 » The Treaty of Versailles is signed, ending the state of war between Germany and the Allies of World War I.
November 28 » Lady Astor is elected as a Member of the Parliament of the United Kingdom. She is the first woman to sit in the House of Commons. (Countess Markievicz, the first to be elected, refused to sit.)
Day of death December 26, 1941
The temperature on December 26, 1941 was between -4.1 °C and 3.5 °C and averaged 0.4 °C. There was 5.3 mm of rain during 5.6 hours. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
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: German bombing severely damages the Llandaff Cathedral in Cardiff, Wales, United Kingdom.
February 25 » The outlawed Communist Party of the Netherlands organises a general strike in German-occupied Amsterdam to protest against Nazi persecution of Dutch Jews.
March 17 » In Washington, D.C., the National Gallery of Art is officially opened by President Franklin D. Roosevelt.
September 28 » Ted Williams achieves a .406 batting average for the season, and becomes the last major league baseball player to bat .400 or better.
November 25 » HMSBarham is sunk by a German torpedo during World War II.
December 28 » World War II: Operation Anthropoid, the plot to assassinate high-ranking Nazi officer Reinhard Heydrich, commences.
When copying data from this family tree, please include a reference to the origin: J. van Broekhoven, "Database Van Broekhoven", database, Genealogy Online (https://www.genealogieonline.nl/database-van-broekhoven/I47381.php : accessed March 4, 2026), "Petronella Francisca de Groot (1896-1941)".
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.