The temperature on March 21, 1889 was about 7.3 °C. There was 5 mm of rain. The air pressure was 8 kgf/m2 and came mainly from the north-northeast. The airpressure was 74 cm mercury. The atmospheric humidity was 83%. Source: KNMI
January 22 » Columbia Phonograph is formed in Washington, D.C.
May 31 » Johnstown Flood: Over 2,200 people die after a dam fails and sends a 60-foot (18-meter) wall of water over the town of Johnstown, Pennsylvania.
September 28 » The General Conference on Weights and Measures (CGPM) defines the length of a meter.
October 24 » Henry Parkes delivers the Tenterfield Oration, effectively starting the federation process in Australia.
November 8 » Montana is admitted as the 41st U.S. state.
November 11 » The State of Washington is admitted as the 42nd state of the United States.
Day of marriage May 4, 1912
The temperature on May 4, 1912 was between 5.1 °C and 12.1 °C and averaged 8.7 °C. There was 0.1 hours of sunshine (1%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
March 5 » Italo-Turkish War: Italian forces are the first to use airships for military purposes, employing them for reconnaissance behind Turkish lines.
April 10 » RMS Titanic sets sail from Southampton, England on her maiden and only voyage.
April 17 » Russian troops open fire on striking goldfield workers in northeast Siberia, killing at least 150.
June 30 » The Regina Cyclone, Canada's deadliest tornado event, kills 28 people in Regina, Saskatchewan.
October 17 » Bulgaria, Greece and Serbia declare war on the Ottoman Empire, joining Montenegro in the First Balkan War.
December 3 » Bulgaria, Greece, Montenegro, and Serbia (the Balkan League) sign an armistice with the Ottoman Empire, temporarily halting the First Balkan War. (The armistice will expire on February 3, 1913, and hostilities will resume.)
Day of death August 11, 1952
The temperature on August 11, 1952 was between 13.4 °C and 22.8 °C and averaged 17.6 °C. There was 0.2 mm of rain during 0.6 hours. There was 3.2 hours of sunshine (21%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
January 26 » Black Saturday in Egypt: rioters burn Cairo's central business district, targeting British and upper-class Egyptian businesses.
March 21 » Alan Freed presents the Moondog Coronation Ball, the first rock and roll concert, in Cleveland, Ohio.
May 2 » A De Havilland Comet makes the first jetliner flight with fare-paying passengers, from London to Johannesburg.
May 7 » The concept of the integrated circuit, the basis for all modern computers, is first published by Geoffrey Dummer.
July 21 » The 7.3 Mw Kern County earthquake strikes Southern California with a maximum Mercalli intensity of XI (Extreme), killing 12 and injuring hundreds.
September 12 » Strange occurrences, including a monster sighting, take place in Flatwoods, West Virginia.
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/I17969.php : accessed October 18, 2026), "Tjeerd Postma (1889-1952)".
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