The temperature on April 30, 1943 was between 5.9 °C and 14.0 °C and averaged 10.4 °C. There was 0.6 mm of rain during 1.8 hours. There was 4.7 hours of sunshine (32%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
January 27 » World War II: The Eighth Air Force sorties ninety-one B-17s and B-24s to attack the U-boat construction yards at Wilhelmshaven, Germany. This was the first American bombing attack on Germany.
March 2 » World War II: Allied aircraft defeat a Japanese attempt to ship troops to New Guinea.
March 27 » World War II: Battle of the Komandorski Islands: In the Aleutian Islands the battle begins when United States Navy forces intercept Japanese attempting to reinforce a garrison at Kiska.
April 13 » The Jefferson Memorial is dedicated in Washington, D.C., on the 200th anniversary of President Thomas Jefferson's birth.
August 31 » USSHarmon, the first U.S. Navy ship to be named after a black person, is commissioned.
October 19 » Streptomycin, the first antibiotic remedy for tuberculosis, is isolated by researchers at Rutgers University.
When copying data from this family tree, please include a reference to the origin: Hilbert Botter, "Family tree Botter", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-botter/I4001.php : accessed February 17, 2026), "Roelof Botter (-1943)".
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