About the day » Thursday April 21, 1870Calender converter

• Albertus Burghout, Apeldoorn, GD, Nederland († 1900)
• Agatha Vrakking, bussum († 1870)
• Antje Haagman Schielaar, Rotterdam († 1969)
• Anna Catharina Grootveld, Amsterdam (NL)
• Abraham Kramp, Leiden,, Zuid-Holland, Nederland († 1872)
• Adriana de Ooij, Vlaardingen († 1872)
• Anna Martina Stevense, Middelburg, Zeeland, Nederland
• Anna Catharina Kockx, Antwerpen († 1872)
• Aaltje Talsma, Oudeschoot, Schoterland, Friesland, Netherlands († 1943)
• Anna Elisabetha Ehlich, Frankenberg

• arie joostzn. KALIS (69), sliedrecht
• Arie Kalis (69), Sliedrecht, Nederland
• Anna Elisabeth van de Wijer (36), Merkelbeek,, Limburg, Nederland
• Alex Börgeling (38), Gildehaus
• Adrianus van Wette (74), Ter Aar (Langeraar)
• Anna Elisabeth van de Wijer (36), Merkelbeek, schinnen
• Annita Johanna Swinderen, van (2), Amsterdam
• Anna Bijl (0), Sneek, Friesland, Nederland
• Antonetta Luijken (38), Rijsbergen
• Cornelia Kemmers (34), 's-Gravenzande

• 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. Elizabeth

• 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 15 » A political cartoon for the first time symbolizes the Democratic Party with a donkey ("A Live Jackass Kicking a Dead Lion" by Thomas Nast for Harper's Weekly).
• February 25 » Hiram Rhodes Revels, a Republican from Mississippi, is sworn into the United States Senate, becoming the first African American ever to sit in Congress.
• July 15 » Reconstruction Era of the United States: Georgia becomes the last of the former Confederate states to be readmitted to the Union.
• September 3 » Franco-Prussian War: The Siege of Metz begins, resulting in a decisive Prussian victory on October 23.
• September 4 » Emperor Napoleon III of France is deposed and the Third Republic is declared.
• October 2 » A plebiscite held in Rome, supports annexation of city of Rome by the Kingdom of Italy.

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%.