About the day » Thursday April 21, 1870Calender converter

• Proost, Amsterdam († 1870)
• Aalbert Nuijen, Putten († 1872)
• Abraham Jacob Caransa, Amsterdam († 1942)
• Abraham Caransa, Amsterdam, Noord-Holland, Nederland († 1942)
• Abraham Jacob Caransa (deca Caranca), Amsterdam, Nederland, Noord-Holland, Nederland († 1942)
• Antje Haagman Schielaar, Rotterdam
• Anna Maria Elisabeth CONINX, Stevoort, Provincie Limburg, Flanders, Belgie
• Aloysius Weemaes, Sint Jansteen, Nederland
• Alida Catharina Onstenk, Wijk aan zee en duin, NH, Nederland († 1935)
• Annegje Bakker, Weststellingwerf

• Arie Kalis (69), Sliedrecht, Nederland
• Annita Johanna Swinderen, van (2), Amsterdam
• Anne Therese Baeten, Kaaskerke
• Aart van den Berg (0), Bennekom (Ede)
• Adrianus Hameete (47)
• Antonij Derk Wijmer (40), Zutphen (Zutphen), Gelderland, Nederland
• Anna Bijl (0), Sneek, Friesland, Nederland
• Anna Elisabeth van de Wijer (36), Merkelbeek
• Anneke Baijens (60), Eethen, Noord-Brabant, Nederland
• Arie Stolk (0), rockanje

• 1851 » Charles Barrois, French geologist and palaeontologist († 1939)
• 1854 » William Stang, German-American bishop († 1907)
• 1864 » Max Weber, German economist and sociologist († 1920)
• 1868 » Alfred Henry Maurer, American painter († 1932)
• 1870 » Edwin Stanton Porter, American director, producer, and screenwriter († 1941)
• 1874 » Vincent Scotto, French actor and composer († 1952)
• 1882 » Percy Williams Bridgman, American physicist and academic, Nobel Prize laureate († 1961)
• 1885 » Tatu Kolehmainen, Finnish runner († 1967)
• 1887 » Joe McCarthy, American baseball manager († 1978)
• 1889 » Marcel Boussac, French businessman († 1980)

• 1815 » Joseph Winston, American soldier and politician (b. 1746)
• 1825 » Johann Friedrich Pfaff, German mathematician and academic (b. 1765)
• 1852 » Ivan Nabokov, Russian general (b. 1787)
• 1863 » Sir Robert Bateson, 1st Baronet, Irish politician (b. 1782)
• 1900 » Vikramatji Khimojiraj, Indian ruler (b. 1819)
• 1910 » Mark Twain, American novelist, humorist, and critic (b. 1835)
• 1918 » Manfred von Richthofen, German captain and pilot (b. 1892)
• 1924 » Eleonora Duse, Italian actress (b. 1858)
• 1930 » Robert Bridges, English poet and author (b. 1844)
• 1932 » Friedrich Gustav Piffl, Bohemian cardinal (b. 1864)

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

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

• Koning Willem III (Huis van Oranje-Nassau) was from 1849 till 1890 sovereign of the Netherlands (also known as Koninkrijk der Nederlanden)
• From June 4, 1868 till January 4, 1871 the Netherlands had a cabinet Van Bosse - Fock with the prime ministers Mr. P.P. van Bosse (liberaal) and Mr. C. Fock (liberaal).
• The Netherlands had about 3.6 million citizens.
• January 26 » Reconstruction Era: Virginia rejoins the Union.
• February 3 » The Fifteenth Amendment to the United States Constitution is ratified, guaranteeing voting rights to male citizens regardless of race.
• February 28 » The Bulgarian Exarchate is established by decree of Sultan Abdülaziz of the Ottoman Empire.
• March 16 » The first version of the overture fantasy Romeo and Juliet by Tchaikovsky receives its première performance.
• November 1 » In the United States, the Weather Bureau (later renamed the National Weather Service) makes its first official meteorological forecast.
• December 12 » Joseph H. Rainey of South Carolina becomes the second black U.S. congressman.

The temperature on April 21, 1870 was about 25.5 °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 32%.