The temperature on July 23, 1911 was between 14.7 °C and 25.0 °C and averaged 19.8 °C. There was 11.4 hours of sunshine (71%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
January 18 » Eugene B. Ely lands on the deck of the USSPennsylvania anchored in San Francisco Bay, the first time an aircraft landed on a ship.
April 6 » During the Battle of Deçiq, Dedë Gjon Luli Dedvukaj, leader of the Malësori Albanians, raises the Albanian flag in the town of Tuzi, Montenegro, for the first time after George Kastrioti (Skanderbeg).
May 15 » More than 300 Chinese immigrants are killed in the Torreón massacre when the forces of the Mexican Revolution led by Emilio Madero take the city of Torreón from the Federales.
August 14 » United States Senate leaders agree to rotate the office of President pro tempore of the Senate among leading candidates to fill the vacancy left by William P. Frye's death.
September 18 » Russian Premier Pyotr Stolypin is shot at the Kiev Opera House.
October 13 » Prince Arthur, Duke of Connaught and Strathearn, becomes the first Governor General of Canada of royal descent.
Day of marriage May 20, 1936
The temperature on May 20, 1936 was between 8.4 °C and 19.1 °C and averaged 13.2 °C. There was 12.2 hours of sunshine (77%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
April 3 » Bruno Richard Hauptmann is executed for the kidnapping and death of Charles Augustus Lindbergh, Jr., the baby son of pilot Charles Lindbergh.
June 11 » The London International Surrealist Exhibition opens.
August 4 » Prime Minister of Greece Ioannis Metaxas suspends parliament and the Constitution and establishes the 4th of August Regime.
September 14 » Raoul Villain, who assassinated the French Socialist Jean Jaures, is himself killed by Spanish Republicans in Ibiza
November 2 » The British Broadcasting Corporation initiates the BBC Television Service, the world's first regular, "high-definition" (then defined as at least 200 lines) service. Renamed BBC1 in 1964, the channel still runs to this day.
December 10 » Abdication Crisis: Edward VIII signs the Instrument of Abdication.
Day of death March 1, 1991
The temperature on March 1, 1991 was between 0.7 °C and 8.6 °C and averaged 4.1 °C. There was 2.9 mm of rain during 4.0 hours. There was 2.0 hours of sunshine (18%). The almost completely overcast was. The average windspeed was 1 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
January 7 » Roger Lafontant, former leader of the Tonton Macoute in Haiti under François Duvalier, attempts a coup d'état, which ends in his arrest.
February 23 » In Thailand, General Sunthorn Kongsompong leads a bloodless coup d'état, deposing Prime Minister Chatichai Choonhavan.
May 21 » Mengistu Haile Mariam, president of the People's Democratic Republic of Ethiopia, flees Ethiopia, effectively bringing the Ethiopian Civil War to an end.
August 19 » Dissolution of the Soviet Union, August Coup: Soviet President Mikhail Gorbachev is placed under house arrest while on holiday in the town of Foros, Ukraine.
August 25 » Linus Torvalds announces the first version of what will become Linux.
September 6 » The Russian parliament approves the name change of Leningrad back to Saint Petersburg. The change is effective October 1, 1991.
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/I131388.php : accessed January 9, 2026), "Johannes Potstra (1911-1991)".
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