About the day » Friday April 12, 1861Calender converter

• Aaltje Hagenouw, Uitwierde († 1933)
• Andries Pool, hallum († 1861)
• Adriaantje SMITS, Rijswijk in het Land van Heusden en Altena († 1861)
• Andries van der Kraats, Gemeente Boskoop, Zuid-Holland, Nederland († 1933)
• Aleida Euphemia Leus, Almelo († 1909)
• Aldegondis Janssen, Horst, Limburg, Nederland
• Aloysius Vanhove, Oostnieuwkerke
• Albertha Euphemia Leus († 1909)
• van Willes, Voorburg
• Aloysius Wynant, Denderhoutem († 1891)

• Aalbert Fiet (86), Rheden, GLD, Nederland
• Anna Diderika van Heeckeren van Brandsenburg (86), Breda, Nederland
• Andries Bleijsie (19), Frederiksoord/Vledder
• Anna Maria Lembrechts (39), Pulderbos
• Adam Titus Graaf Dzialynsky (63), Poznan (Posen), Groot-Polen
• Antonie Peek (0), Everdingen
• Albert Jan Meijer (2), Wapenveld, Heerde, Gelderland, Nederland
• Antonia De Meersman, Liedekerke
• Weenig (0), Rotterdam, Zuid-Holland, Nederland
• Aardt Nikkelen (39), Nijmegen, Nederland

• 1845 » Gustaf Cederström, Swedish painter († 1933)
• 1851 » Edward Walter Maunder, English astronomer and author († 1928)
• 1851 » José Gautier Benítez, Puerto Rican soldier and poet († 1880)
• 1852 » Ferdinand von Lindemann, German mathematician and academic († 1939)
• 1856 » Martin Conway, 1st Baron Conway of Allington, English mountaineer, cartographer, and politician († 1937)
• 1863 » Raul Pompeia, Brazilian writer († 1895)
• 1868 » Akiyama Saneyuki, Japanese admiral († 1918)
• 1869 » Henri Désiré Landru, French serial killer († 1922)
• 1871 » Ioannis Metaxas, Greek general and politician, 130th Prime Minister of Greece († 1941)
• 1874 » William B. Bankhead, American lawyer and politician, 47th Speaker of the United States House of Representatives († 1940)

• 1817 » Charles Messier, French astronomer and academic (b. 1730)
• 1850 » Adoniram Judson, American lexicographer and missionary (b. 1788)
• 1866 » Peter Hesketh-Fleetwood, English politician, founded Fleetwood (b. 1801)
• 1872 » Nikolaos Mantzaros, Greek composer and theorist (b. 1795)
• 1878 » William M. Tweed, American lawyer and politician (b. 1823)
• 1879 » Richard Taylor, American general (b. 1826)
• 1885 » William Crowther, Dutch-Australian politician, 14th Premier of Tasmania (b. 1817)
• 1898 » Elzéar-Alexandre Taschereau, Canadian cardinal (b. 1820)
• 1902 » Marie Alfred Cornu, French physicist and academic (b. 1842)
• 1906 » Mahesh Chandra Nyayratna Bhattacharyya, Indian scholar, academic, and philanthropist (b. 1836)

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 9 » American Civil War: "Star of the West" incident occurs near Charleston, South Carolina.
• January 19 » American Civil War: Georgia joins South Carolina, Florida, Mississippi, and Alabama in declaring secession from the United States.
• February 4 » American Civil War: In Montgomery, Alabama, delegates from six break-away U.S. states meet and form the Confederate States of America.
• May 6 » American Civil War: Arkansas secedes from the Union.
• October 1 » Mrs Beeton's Book of Household Management is published, going on to sell 60,000 copies in its first year and remaining in print until the present day
• November 7 » American Civil War: Battle of Belmont: In Belmont, Missouri, Union forces led by General Ulysses S. Grant overrun a Confederate camp but are forced to retreat when Confederate reinforcements arrive.

The temperature on April 12, 1861 was about 6.3 °C. The air pressure was 2.5 kgf/m² and came mainly from the north-northeast. The airpressure was 77 cm mercury. The atmospheric humidity was 94%.