June 20 » The Kiel Canal, crossing the base of the Jutland peninsula and the busiest artificial waterway in the world, is officially opened.
October 8 » Korean Empress Myeongseong is assassinated by Japanese infiltrators.
November 5 » George B. Selden is granted the first U.S. patent for an automobile.
November 8 » While experimenting with electricity, Wilhelm Röntgen discovers the X-ray.
November 27 » At the Swedish–Norwegian Club in Paris, Alfred Nobel signs his last will and testament, setting aside his estate to establish the Nobel Prize after he dies.
November 28 » The first American automobile race takes place over the 54 miles from Chicago's Jackson Park to Evanston, Illinois. Frank Duryea wins in approximately 10 hours.
Day of marriage May 1, 1926
The temperature on May 1, 1926 was between 9.3 °C and 18.8 °C and averaged 13.7 °C. There was 2.0 hours of sunshine (13%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the northeast. Source: KNMI
January 8 » Crown Prince Nguyễn Phúc Vĩnh Thuỵ ascends the throne to become the last monarch of Vietnam.
April 21 » Al-Baqi cemetery, former site of the mausoleum of four Shi'a Imams, is leveled to the ground by Wahhabis.
May 18 » Evangelist Aimee Semple McPherson disappears in Venice, California.
May 28 » The 28 May 1926 coup d'état: Ditadura Nacional is established in Portugal to suppress the unrest of the First Republic.
June 28 » Mercedes-Benz is formed by Gottlieb Daimler and Karl Benz merging their two companies.
September 25 » The international Convention to Suppress the Slave Trade and Slavery is first signed.
Day of death March 7, 1937
The temperature on March 7, 1937 was between -1.3 °C and 0.1 °C and averaged -0.6 °C. There was 2.1 mm of rain during 1.8 hours. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
March 8 » Spanish Civil War: The Battle of Guadalajara begins.
April 1 » The Royal New Zealand Air Force is formed as an independent service.
April 12 » Sir Frank Whittle ground-tests the first jet engine designed to power an aircraft, at Rugby, England.
July 5 » Spam, the luncheon meat, is introduced into the market by the Hormel Foods Corporation.
November 8 » The Nazi exhibition Der ewige Jude ("The Eternal Jew") opens in Munich.
December 13 » Second Sino-Japanese War: Battle of Nanking: The city of Nanjing, defended by the National Revolutionary Army under the command of General Tang Shengzhi, falls to the Japanese. This is followed by the Nanking Massacre, in which Japanese troops rape and slaughter hundreds of thousands of civilians.
When copying data from this family tree, please include a reference to the origin: Gert Jonker, "Family tree Jonker", database, Genealogy Online (https://www.genealogieonline.nl/jonker_stamboom/I18061.php : accessed February 23, 2026), "Gerrit de Graaf (1895-1937)".
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