Historical eventMay 91864

Second Schleswig War

Second Schleswig War: The Battle of Heligoland (depicted), the last naval engagement fought by squadrons of wooden ships, took place between the Danish and Austro-Prussian fleets.

Everything on May 9Original source

In context

When
Monday, May 9 1864162 years ago
Category
Historical eventA dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Era
19th century · 1860s
Recorded from
Wikipedia “On this day” feed

Russia, Greece and some other countries used the Julian calendar into the early 20th century, so local records may show a date up to 13 days earlier.

At a glance

Dates: From 1864.

What happened

Second Schleswig War: The Battle of Heligoland (depicted), the last naval engagement fought by squadrons of wooden ships, took place between the Danish and Austro-Prussian fleets.

May 9 through the years

Other entries on the same calendar day, in order.

  1. 1864Second Schleswig War
  2. 2001Accra Sports Stadium
  3. 2001Ghana
  4. 2002Siege of the Church of the Nativity
  5. 2005Pope Benedict XVI
  6. 2012Yakovlev SJ-100
  7. 2018Barisan Nasional
  8. 2020COVID-19 recession
  9. 2022Russo-Ukrainian war
  10. 20232023 Pakistani protests
  11. 2023May 9 riots

Also in 1864

  • March 14Petite messe solennelleThe Petite messe solennelle by Gioachino Rossini was first performed in Paris, 34 years after his retirement as a composer.
  • August 10José Antônio SaraivaJosé Antônio Saraiva announced that the Brazilian military would exact reprisals after Uruguay's governing Blanco Party refused Brazil's…
  • July 22American Civil WarAmerican Civil War: Confederate forces unsuccessfully attacked Union troops at the Battle of Atlanta.
  • June 15American Civil WarAmerican Civil War: The Second Battle of Petersburg begins.
  • November 15American Civil WarAmerican Civil War: Union army general William Tecumseh Sherman (pictured) began his March to the Sea, inflicting significant damage to p…
  • July 11American Civil WarAmerican Civil War: Confederate forces under Jubal Early began an unsuccessful attempt to capture Washington, D.C..
  • July 11Leicester balloon riotA riot broke out in Leicester, England, at the failed launching of a gas balloon (pictured).
  • November 4American Civil WarAmerican Civil War: Nathan Bedford Forrest led a cavalry division in an attack on a Union Army supply base at Johnsonville, Tennessee, re…

Everything we record for 1864 →

Sources

Cite this page

“Second Schleswig War”, What's On This Date, https://whatsonthisdate.com/app/event/second-schleswig-war-1864-may-9, accessed October 26, 2026.

Cite the underlying source as well — the source links above go to the record this entry is adapted from.

Questions about this entry

When did Second Schleswig War happen?

May 9 1864 — 162 years ago, on a Monday.

Where does this text come from?

Wikipedia “On this day” feed. Summaries are short adaptations that link back to the source, not reprints.

How do I cite this page?

Use the ready-made citation near the sources at the bottom of the page, and follow the source link to cite the underlying record as well.

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