About the day » Saturday April 20, 1861Calender converter

• Alfred Carel Johan van der Sloot
• Aaltje Veen, Valtherveen († 1905)
• Adelaide Marcondes Zanardini, Palmeira, Paraná, Brasil
• Aagje Zaal, Bodegraven († 1940)
• Adrianus Theuns
• Adrianus Josephus Damen, 's-Hertogenbosch,North Brabant,Netherlands († 1948)
• Angela Adelheid Brink, Haar († 1940)
• Angela Adelheid - Hahnen Engel Brink, Altharen, Emsland, Niedersachsen, Deutschland († 1940)
• Alida Wilhelmina Stroethoff, Amsterdam († 1863)
• in 't Veld, Dubbeldam, Zuid-Holland, Nederland

• Adriana Verhage (13), Haamstede, Zeeland, NL
• (Stillborn) in 't Veld (in ’t Veldt, In ’t Velt) (0), Dubbeldam, Nederland
• Alexander Prins Mavrogordat (86)
• (13), Haamstede, 4328, Nederland
• Adrianus Bruijnen (72)
• Alida Eijsendoorn (32), Utrecht
• Albertina Jacobs (64), Temse
• Aagje SCHOL Ldr (19)
• Alida Eijsendoorn (32), Utrecht
• Agnes Dick (75), Merrilees, Abercorn, West Lothian, Scotland

• 1840 » Odilon Redon, French painter and illustrator († 1916)
• 1850 » Daniel Chester French, American sculptor, designed the Lincoln statue († 1931)
• 1851 » Alexander Dianin, Russian chemist († 1918)
• 1851 » Siegmund Lubin, Polish-American businessman, founded the Lubin Manufacturing Company († 1923)
• 1860 » Justinien de Clary, French target shooter († 1933)
• 1871 » Sydney Chapman, English economist and civil servant († 1951)
• 1873 » James Harcourt, English character actor († 1951)
• 1875 » Vladimir Vidrić, Croatian poet and lawyer († 1909)
• 1879 » Paul Poiret, French fashion designer († 1944)
• 1882 » Holland Smith, American general († 1967)

• 1831 » John Abernethy, English surgeon and anatomist (b. 1764)
• 1873 » William Tite, English architect, designed the Royal Exchange (b. 1798)
• 1874 » Alexander H. Bailey, American lawyer, judge, and politician (b. 1817)
• 1881 » William Burges, English architect and designer (b. 1827)
• 1886 » Charles-François-Frédéric, marquis de Montholon-Sémonville, French general and diplomat, French ambassador to the United States (b. 1814)
• 1887 » Muhammad Sharif Pasha, Greek-Egyptian politician, 2nd Prime Minister of Egypt (b. 1826)
• 1899 » Joseph Wolf, German ornithologist and illustrator (b. 1820)
• 1902 » Joaquim de Sousa Andrade, Brazilian poet and educator (b. 1833)
• 1912 » Bram Stoker, Anglo-Irish novelist and critic, created Count Dracula (b. 1847)
• 1918 » Karl Ferdinand Braun, German-American physicist and academic, Nobel Prize laureate (b. 1850)

1. Jan
2. Johannes
3. Cornelis
4. Hendrik
5. Pieter
6. Willem
7. Gerrit
8. Jacob
9. Petrus
10. Jacobus
11. Dirk
12. Adrianus
13. Arie
14. Klaas
15. Hendrikus
16. Albert

1. Maria
2. Johanna
3. Anna
4. Cornelia
5. Elisabeth
6. Catharina
7. Adriana
8. Hendrika
9. Wilhelmina
10. Aaltje
11. Grietje
12. Trijntje
13. Neeltje
14. Antje
15. Elizabeth
16. Mary

• Koning Willem III (Huis van Oranje-Nassau) was from 1849 till 1890 sovereign of the Netherlands (also known as Koninkrijk der Nederlanden)
• 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).
• The Netherlands had about 3.6 million citizens.
• January 1 » Liberal forces supporting Benito Juárez enter Mexico City.
• March 11 » American Civil War: The Constitution of the Confederate States of America is adopted.
• May 13 » Pakistan's (then a part of British India) first railway line opens, from Karachi to Kotri.
• May 20 » American Civil War: The state of Kentucky proclaims its neutrality, which will last until September 3 when Confederate forces enter the state. Meanwhile, the State of North Carolina secedes from the Union.
• July 21 » American Civil War: First Battle of Bull Run: At Manassas Junction, Virginia, the first major battle of the war begins and ends in a victory for the Confederate army.
• October 24 » The first transcontinental telegraph line across the United States is completed.

The temperature on April 20, 1861 was about 9.4 °C. The air pressure was 1 kgf/m² and came mainly from the south-southeast. The airpressure was 77 cm mercury. The atmospheric humidity was 56%.