The temperature on March 28, 1885 was about 5.0 °C. There was 0.2 mm of rain. The air pressure was 4 kgf/m2 and came mainly from the north-northwest. The airpressure was 77 cm mercury. The atmospheric humidity was 89%. Source: KNMI
In The Netherlands , there was from April 23, 1884 to April 21, 1888 the cabinet Heemskerk, with Mr. J. Heemskerk Azn. (conservatief) as prime minister.
February 8 » The first government-approved Japanese immigrants arrived in Hawaii.
February 18 » Adventures of Huckleberry Finn by Mark Twain is published in the United States.
March 23 » Sino-French War: Chinese victory in the Battle of Phu Lam Tao near Hưng Hóa, northern Vietnam.
November 16 » Canadian rebel leader of the Métis and "Father of Manitoba" Louis Riel is executed for treason.
November 17 » Serbo-Bulgarian War: The decisive Battle of Slivnitsa begins.
November 28 » Bulgarian victory in the Serbo-Bulgarian War preserves the Unification of Bulgaria.
Day of marriage June 13, 1911
The temperature on June 13, 1911 was between 5.3 °C and 17.0 °C and averaged 11.6 °C. There was 5.2 mm of rain. There was 7.3 hours of sunshine (44%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
January 5 » Kappa Alpha Psi, the world's third oldest and largest black fraternity, is founded at Indiana University.
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.
July 7 » The United States, UK, Japan, and Russia sign the North Pacific Fur Seal Convention of 1911 banning open-water seal hunting, the first international treaty to address wildlife preservation issues.
September 1 » The armored cruiser Georgios Averof is commissioned into the Greek Navy. It now serves as a museum ship.
October 13 » Prince Arthur, Duke of Connaught and Strathearn, becomes the first Governor General of Canada of royal descent.
November 1 » World's first combat aerial bombing mission takes place in Libya during the Italo-Turkish War. Second Lieutenant Giulio Gavotti of Italy drops several small bombs.
Day of death October 5, 1957
The temperature on October 5, 1957 was between 6.9 °C and 16.1 °C and averaged 11.8 °C. There was 0.1 mm of rain during 0.1 hours. There was 0.9 hours of sunshine (8%). The almost completely overcast was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Sim Mostert, "Genealogy Pot en Smit", database, Genealogy Online (https://www.genealogieonline.nl/genealogie_pot_smit/I3722.php : accessed December 25, 2025), "IVO WILLEM OPSTELTEN (1885-1957)".
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