January 24 » Second Boer War: Boers stop a British attempt to break the Siege of Ladysmith in the Battle of Spion Kop.
May 1 » The Scofield Mine disaster kills over 200 men in Scofield, Utah in what is to date the fifth-worst mining accident in United States history.
May 24 » Second Boer War: The United Kingdom annexes the Orange Free State.
June 25 » The Taoist monk Wang Yuanlu discovers the Dunhuang manuscripts, a cache of ancient texts that are of great historical and religious significance, in the Mogao Caves of Dunhuang, China.
August 16 » The Battle of Elands River during the Second Boer War ends after a 13-day siege is lifted by the British. The battle had begun when a force of between 2,000 and 3,000 Boers had surrounded a force of 500 Australians, Rhodesians, Canadians and British soldiers at a supply dump at Brakfontein Drift.
October 19 » Max Planck discovers Planck's law of black-body radiation.
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
March 18 » The United States begins secretly bombing the Sihanouk Trail in Cambodia, used by communist forces to infiltrate South Vietnam.
May 26 » Apollo program: Apollo 10 returns to Earth after a successful eight-day test of all the components needed for the forthcoming first manned moon landing.
August 8 » At a zebra crossing in London, photographer Iain Macmillan takes the iconic photo that becomes the cover image of the Beatles' album Abbey Road.
August 11 » The Apollo 11 astronauts are released from a three-week quarantine following their liftoff from the moon.
September 25 » The charter establishing the Organisation of Islamic Cooperation is signed.
November 20 » Occupation of Alcatraz: Native American activists seize control of Alcatraz Island until being ousted by the U.S. Government on June 11, 1971.
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 October 19, 2026), "Hendrik Harmannus Niemeijer (1900-1969)".
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