March 14 » The Gold Standard Act is ratified, placing the United States currency on the gold standard.
March 16 » Sir Arthur Evans purchased the land around the ruins of Knossos, the largest Bronze Age archaeological site on Crete.
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.
June 21 » Boxer Rebellion. China formally declares war on the United States, Britain, Germany, France and Japan, as an edict issued from the Empress Dowager Cixi.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of death June 20, 1969
The temperature on June 20, 1969 was between 7.5 °C and 19.5 °C and averaged 13.4 °C. There was 1.1 mm of rain during 0.9 hours. There was 5.5 hours of sunshine (33%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
January 14 » USS Enterprise fire: An accidental explosion aboard the USSEnterprise near Hawaii kills 28 people.
March 13 » Apollo 9 returns safely to Earth after testing the Lunar Module.
June 28 » Stonewall riots begin in New York City, marking the start of the Gay Rights Movement.
September 1 » A coup in Libya brings Muammar Gaddafi to power.
September 25 » The charter establishing the Organisation of Islamic Cooperation is signed.
November 24 » Apollo program: The Apollo 12 command module splashes down safely in the Pacific Ocean, ending the second manned mission to land on the Moon.
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/I208916.php : accessed February 15, 2026), "Hendrik Harmannus Niemeijer (1900-1969)".
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