Editing 1841 (section)

=== January–March ===
* [[January 20]] – [[Charles Elliot]] of the United Kingdom and [[Qishan (official)|Qishan]] of the [[Qing dynasty]] agree to the [[Convention of Chuenpi]].
* [[January 26]] – Britain occupies [[Hong Kong]]. Later in the year, the first census of the island records a population of about 7,500.<ref>{{cite book|first=John|last=Thomson|author-link=John Thomson (photographer)|url=http://irc.aa.tufs.ac.jp/thomson/vol_1/mother/102.html|chapter=Hong-Kong|title=Illustrations of China and Its People|volume=1|location=London|year=1873}}</ref>
* [[January 27]] – The active [[volcano]] [[Mount Erebus]] in Antarctica is discovered, and named by [[James Clark Ross]].<ref>Ross, ''Voyage to the Southern Seas'', '''1''', pp. 216–218.</ref>
* [[January 28]] – Ross discovers the "Victoria Barrier", later known as the [[Ross Ice Shelf]]. On the same voyage, he discovers the [[Ross Sea]], [[Victoria Land]] and [[Mount Terror (Antarctica)|Mount Terror]].
* [[January 30]] – 
**[[El Salvador]] proclaims itself an independent republic, bringing an end to the  [[Federal Republic of Central America]].<ref>{{cite book|last1=Marure|first1=Alejandro|date=1895|title=Efemérides de los Hechos Notables Acaecidos en la República de Centro-América Desde el Año de 1821 Hasta el de 1842|trans-title=Ephemeris of the Notable Events that Occurred in the Republic of Central America from the Year 1821 to that of 1842|url=https://archive.org/details/efemeridesdeloshe00alejguat/page/n11/mode/2up|language=es|location=Central America|publisher=Tipografía Nacional|page=127|oclc=02933391|access-date=26 April 2024}}</ref>
**A fire destroys two-thirds of the city of [[Mayagüez, Puerto Rico]].<ref>"Mayagüez; Notas para su Historia"; by Silvia Aguilo Ramos (Author); Page: 76; Publisher: Model Offset Printing, San Juan (1984); Language: Spanish</ref>
* [[February 4]] – The first known reference is made to [[Groundhog Day]], celebrated in North America, in the diary of a James Morris.
* [[February 10]] – The [[Act of Union 1840|Act of Union]] (''British North America Act'', [[1840]]) is proclaimed in Canada.
* [[February 11]] – [[Upper Canada]] and [[Lower Canada]] are merged to create the [[United Province of Canada]].<ref>{{Cite encyclopedia |last=Monet|first=Jacques |title=Act of Union |encyclopedia=[[The Canadian Encyclopedia]] |date=27 September 2019 |publisher=[[Historica Canada]] |edition=online |url=https://www.thecanadianencyclopedia.ca/en/article/act-of-union}}</ref>
* [[February 18]] – The first ongoing [[filibuster]] in the [[United States Senate]] begins, and lasts until [[March 11]].
* [[March 9]] – ''[[United States v. The Amistad]]'': The [[Supreme Court of the United States]] rules in the case, that the Africans who seized control of the ship had been taken into [[slavery]] illegally.
* [[March 12]] – All 136 passengers and crew on steamship {{SS|President}}, commanded by legendary captain [[Richard Roberts (sea captain)|Richard Roberts]] (known for saying "I'd go to sea in a bathtub"), are killed when the ship founders in rough seas.<ref>{{cite book|last = Fox|first = Stephen|title = Transatlantic: Samuel Cunard, Isambard Brunel and the Great Atlantic Steamships|url = https://archive.org/details/transatlanticsam00foxs|url-access = registration|publisher =Harper Collins|year =2004|isbn =0-06-095549-X}}</ref>