March 1 » Henri Becquerel discovers radioactive decay.
May 26 » Charles Dow publishes the first edition of the Dow Jones Industrial Average.
June 15 » The deadliest tsunami in Japan's history kills more than 22,000 people.
September 21 » Anglo-Egyptian conquest of Sudan: British forces under the command of Horatio Kitchener take Dongola.
December 10 » Alfred Jarry's Ubu Roi premieres in Paris. A riot breaks out at the end of the performance.
December 30 » Canadian ice hockey player Ernie McLea scores the first hat-trick in Stanley Cup play, and the Cup-winning goal as the Montreal Victorias defeat the Winnipeg Victorias 6–5.
Day of marriage June 1, 1918
The temperature on June 1, 1918 was between 6.3 °C and 19.5 °C and averaged 13.5 °C. There was 12.0 hours of sunshine (73%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. 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.
February 1 » Russia adopts the Gregorian calendar.
August 11 » World War I: The Battle of Amiens ends.
October 3 » King Boris III of Bulgaria accedes to the throne.
October 4 » World War I: An explosion kills more than 100 people and destroys a Shell Loading Plant in New Jersey.
November 12 » Austria becomes a republic. After the proclamation, a coup attempt by the communist Red Guard is defeated by the social-democratic Volkswehr.
November 13 » World War I: Allied troops occupy Constantinople, the capital of the Ottoman Empire.
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/I201884.php : accessed October 8, 2026), "Seike Heerema (1896-????)".
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