Editing 1839 (section)

=== January–March ===
* [[January 2]] – The first photograph of the Moon is taken, by French photographer [[Louis Daguerre]].
* [[January 6]] – [[Night of the Big Wind]]: Ireland is struck by the most damaging [[cyclone]] in 300 years.
* [[January 9]] – The [[French Academy of Sciences]] announces the [[daguerreotype]] [[photography]] process.
* [[January 19]] – The British [[Aden Expedition]] captures Aden.
* [[January 20]] – [[Battle of Yungay]]: [[Chile]] defeats the [[Peru–Bolivian Confederation]], leading to the restoration of an independent [[Peru]].
* [[January]] – The first [[parallax]] measurement of the distance to [[Alpha Centauri]] is published by [[Thomas Henderson (astronomer)|Thomas Henderson]].
* [[February 11]] – The [[University of Missouri]] is established, becoming the first public university west of the [[Mississippi River]].
* [[February 24]] – [[William Otis]] receives a U.S. [[patent]] for the [[steam shovel]].
* [[March 5]] – [[Longwood University]] is founded in [[Farmville, Virginia]].
* [[March 7]] – [[Baltimore City College]], the third public high school in the United States, is established in [[Baltimore]], [[Maryland]].
* [[March 9]]
** The [[Anti-Corn Law League]] is founded in [[Manchester]], England.
** The [[Pastry War]] between [[July Monarchy|France]] and [[Centralist Republic of Mexico|Mexico]] ends.
** [[Prussia]] imposes the Child Labor Law of 1839, becoming the first nation in the world to place restrictions on [[Child labour|child labor]].
* [[March 23]]
**An [[1839 Ava earthquake|earthquake in the Kingdom of Burma]] kills more than 400 people and destroys three cities, as well as heavily damaging the capital at [[Inwa|Ava]].
**The ''[[Boston Morning Post]]'' first records the use of "O.K." ([[oll korrect]]).
* [[March 26]] – The first [[Henley Royal Regatta]] is held on the [[River Thames]] in England.