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.
January 3 » Sino-French War: Beginning of the Battle of Núi Bop
March 24 » Sino-French War: Chinese victory in the Battle of Bang Bo on the Tonkin-Guangxi border.
May 1 » The original Chicago Board of Trade Building opens for business.
September 12 » Arbroath 36–0 Bon Accord, a world record scoreline in professional Association football.
September 29 » The first practical public electric tramway in the world is opened in Blackpool, England.
October 13 » The Georgia Institute of Technology is founded in Atlanta, Georgia.
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
February 18 » The first official flight with airmail takes place from Allahabad, United Provinces, British India (now India), when Henri Pequet, a 23-year-old pilot, delivers 6,500 letters to Naini, about 10 kilometres (6.2mi) away.
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 18 » Russian Premier Pyotr Stolypin is shot at the Kiev Opera House.
September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
October 10 » The day after a bomb explodes prematurely, the Wuchang Uprising begins against the Chinese monarchy.
December 29 » Sun Yat-sen becomes the provisional President of the Republic of China; he formally takes office on January 1, 1912.
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 September 25, 2026), "IVO WILLEM OPSTELTEN (1885-1957)".
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