The temperature on January 16, 1861 was about -15.3 °C. The air pressure was 0.5 kgf/m2 and came mainly from the northeast. The airpressure was 77 cm mercury. The atmospheric humidity was 91%. Source: KNMI
From February 23, 1860 till March 14, 1861 the Netherlands had a cabinet Van Hall - Van Heemstra with the prime ministers Mr. F.A. baron Van Hall (conservatief-liberaal) and Mr. S. baron Van Heemstra (liberaal).
From March 14, 1861 till January 31, 1862 the Netherlands had a cabinet Van Zuijlen van Nijevelt - Loudon with the prime ministers Mr. J.P.P. baron Van Zuijlen van Nijevelt (conservatief-liberaal) and Mr. J. Loudon (liberaal).
February 1 » American Civil War: Texas secedes from the United States.
February 11 » American Civil War: The United States House of Representatives unanimously passes a resolution guaranteeing noninterference with slavery in any state.
March 17 » The Kingdom of Italy is proclaimed.
April 6 » First performance of Arthur Sullivan's debut success, his suite of incidental music for The Tempest, leading to a career that included the famous Gilbert and Sullivan operas.
August 5 » American Civil War: In order to help pay for the war effort, the United States government levies the first income tax as part of the Revenue Act of 1861 (3% of all incomes over US$800; rescinded in 1872).
December 10 » Forces led by Nguyễn Trung Trực, an anti-colonial guerrilla leader in southern Vietnam, sink the French lorcha L'Esperance.
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/I16883.php : accessed February 18, 2026), "Jan Klaasz Ooijevaar (± 1803-1861)".
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