February 14 » Voting machines are approved by the U.S. Congress for use in federal elections.
March 4 » Cyclone Mahina sweeps in north of Cooktown, Queensland, with a 12 metres (39ft) wave that reaches up to 5 kilometres (3.1mi) inland, killing over 300.
March 6 » Bayer registers "Aspirin" as a trademark.
July 17 » NEC Corporation is organized as the first Japanese joint venture with foreign capital.
September 23 » The American Asiatic Squadron destroys a Filipino battery at the Battle of Olongapo.
Day of death June 20, 1958
The temperature on June 20, 1958 was between 11.5 °C and 15.5 °C and averaged 13.7 °C. There was 4.9 mm of rain during 5.9 hours. The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 28 » The Lego company patents the design of its Lego bricks, still compatible with bricks produced today.
March 31 » In the Canadian federal election, the Progressive Conservatives, led by John Diefenbaker, win the largest percentage of seats in Canadian history, with 208 seats of 265.
April 4 » The CND peace symbol is displayed in public for the first time in London.
June 17 » The Ironworkers Memorial Second Narrows Crossing, in the process of being built to connect Vancouver and North Vancouver (Canada), collapses into the Burrard Inlet killing 18 ironworkers and injuring others.
July 25 » The African Regroupment Party holds its first congress in Cotonou.
December 14 » The 3rd Soviet Antarctic Expedition becomes the first to reach the southern pole of inaccessibility.
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/I74906.php : accessed October 1, 2026), "Klaas Hamstra (1899-1958)".
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