Undated

• Denmark's first steamship, SS Caledoniam, a paddle steamer baught used in England, begans operations as a mail steamer
  Mail steamer
  Mail steamers were steamships which carried the mail across waterways, such as across an ocean or between islands, primarily during the 19th Century and early 20th Century, when the cost of sending a letter was declining to the point an ordinary person could afford the cost of sending a letter...
  
   between Copenhagen and Kiel
  Kiel
  Kiel is the capital and most populous city in the northern German state of Schleswig-Holstein, with a population of 238,049 .Kiel is approximately north of Hamburg. Due to its geographic location in the north of Germany, the southeast of the Jutland peninsula, and the southwestern shore of the...
  
  .

Births

• March 30 – Vilhelm Kyhn
  Vilhelm Kyhn
  Peter Vilhelm Carl Kyhn, was a Danish landscape painter who belonged to the generation of national romantic painters immediately after the Danish Golden Age and before the Modern Breakthrough...
  
  , painter and educator (died 1903
  1903 in Denmark
  -Incumbents:* Monarch – HM Christian IX* Prime minister – Johan Henrik Deuntzer-Events:* March 2 – A Social Democrat is elected as lord mayor in Copenhagen for the first time.-Undated:* The cakewalk reaches Copenhagen....
  
  )
• May 20 – Pietro Boyesen
  Pietro Boyesen
  Pietro Thyge Boyesen was a Danish photographer who spent most of his professional life in Rome. He is remembered in particular for his portraits of Scandinavians visiting Rome, many of which are now in the Royal Library in Copenhagen....
  
  , photographer (d. 1882)