The temperature on May 30, 1911 was between 13.6 °C and 21.8 °C and averaged 17.6 °C. There was 0.6 mm of rain. There was 4.4 hours of sunshine (27%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
January 12 » The University of the Philippines College of Law is formally established; three future Philippine presidents are among the first enrollees.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
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.
August 29 » The Canadian Naval Service becomes the Royal Canadian Navy.
September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
September 29 » Italy declares war on the Ottoman Empire.
Day of marriage September 5, 1934
The temperature on September 5, 1934 was between 9.4 °C and 21.7 °C and averaged 15.9 °C. There was 9.3 hours of sunshine (69%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
March 26 » The United Kingdom driving test is introduced.
April 12 » The strongest surface wind gust in the world at the time of 231mph, is measured on the summit of Mount Washington, New Hampshire. It has since been surpassed.
July 5 » "Bloody Thursday": Police open fire on striking longshoremen in San Francisco.
July 25 » The Nazis assassinate Austrian Chancellor Engelbert Dollfuss in a failed coup attempt.
August 22 » Bill Woodfull of Australia becomes the only cricket captain to twice regain The Ashes.
October 22 » In East Liverpool, Ohio, FBI agents shoot and kill notorious bank robber Pretty Boy Floyd.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I21847.php : accessed March 5, 2026), "Jacoba Zwiggelaar (1911-)".
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