February 9 » The Davis Cup competition is established.
March 24 » Mayor of New York City Robert Anderson Van Wyck breaks ground for a new underground "Rapid Transit Railroad" that would link Manhattan and Brooklyn.
May 17 » Second Boer War: British troops relieve Mafeking.
June 9 » Indian nationalist Birsa Munda dies of cholera in a British prison.
June 20 » Baron Eduard Toll, leader of the Russian Polar Expedition of 1900, departs Saint Petersburg in Russia on the explorer ship Zarya, never to return.
July 2 » The first Zeppelin flight takes place on Lake Constance near Friedrichshafen, Germany.
Day of marriage February 28, 1928
The temperature on February 28, 1928 was between 0.7 °C and 12.5 °C and averaged 5.2 °C. There was 8.8 hours of sunshine (82%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
April 14 » The Bremen, a German Junkers W 33 type aircraft, reaches Greenly Island, Canada - the first successful transatlantic aeroplane flight from east to west.
May 3 » The Jinan incident begins with the deaths of twelve Japanese civilians by Chinese forces in Jinan, China, which leads to Japanese retaliation and the deaths of over 2,000 Chinese civilians in the following days.
June 8 » Second Northern Expedition: The National Revolutionary Army captures Peking, whose name is changed to Beijing ("Northern Capital").
August 27 » The Kellogg–Briand Pact outlawing war is signed by fifteen nations. Ultimately sixty-one nations will sign it.
October 10 » Chiang Kai-shek becomes Chairman of the Republic of China.
October 22 » Phi Sigma Alpha fraternity is founded at the University of Puerto Rico.
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/I101503.php : accessed December 27, 2025), "Klaas de Boer (1900-)".
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