The temperature on June 9, 1905 was between 10.3 °C and 18.9 °C and averaged 14.2 °C. There was 3.6 hours of sunshine (22%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from August 1, 1901 to August 16, 1905 the cabinet Kuijper, with Dr. A. Kuijper (AR) as prime minister.
In The Netherlands , there was from August 17, 1905 to February 11, 1908 the cabinet De Meester, with Mr. Th. de Meester (unie-liberaal) as prime minister.
April 30 » Albert Einstein completes his doctoral thesis at the University of Zurich.
May 28 » Russo-Japanese War: The Battle of Tsushima ends with the destruction of the Russian Baltic Fleet by Admiral Tōgō Heihachirō and the Imperial Japanese Navy.
August 20 » Sun Yat-sen, Chinese revolutionary, forms the first chapter of T'ung Meng Hui, a union of all secret societies determined to bringing down the Manchus.
September 8 » The 7.2 Mw Calabria earthquake shakes southern Italy with a maximum Mercalli intensity of XI (Extreme), killing between 557 and 2,500 people.
October 26 » King Oscar II recognizes the dissolution of the union between Norway and Sweden.
November 12 » Norway holds a referendum resulting in popular approval of the Storting's decision to authorise the government to make the offer of the throne of the newly independent country.
Day of marriage May 16, 1935
The temperature on May 16, 1935 was between 0.4 °C and 12.0 °C and averaged 6.0 °C. There was 0.5 mm of rain during 1.2 hours. There was 7.7 hours of sunshine (49%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
February 13 » A jury in Flemington, New Jersey finds Bruno Hauptmann guilty of the 1932 kidnapping and murder of the Lindbergh baby, the son of Charles Lindbergh.
March 23 » Signing of the Constitution of the Commonwealth of the Philippines.
June 12 » A ceasefire is negotiated between Bolivia and Paraguay, ending the Chaco War.
July 20 » Switzerland: A Royal Dutch Airlines plane en route from Milan to Frankfurt crashes into a Swiss mountain, killing thirteen.
August 31 » In an attempt to stay out of the growing tensions concerning Germany and Japan, the United States passes the first of its Neutrality Acts.
October 19 » The League of Nations places economic sanctions on Italy for its invasion of Ethiopia.
Day of death February 1, 1965
The temperature on February 1, 1965 was between -3.9 °C and 6.1 °C and averaged 0.3 °C. There was 0.1 mm of rain. There was 2.6 hours of sunshine (29%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Hans Opperman, "Family tree Opperman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-opperman/I2555.php : accessed February 1, 2026), "Wilhelmina Johanna Jansen (1905-1965)".
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