Editing 1880 (section)

=== April–June ===
* [[April]] – The government of [[Cape Colony]] sets a deadline for the Basuto people to surrender their weapons; non-compliance leads to the [[Basuto Gun War]].
* [[April 18]] – [[1880 United Kingdom general election]]: [[William Ewart Gladstone]] defeats [[Benjamin Disraeli]], to become [[Prime Minister of the United Kingdom|Prime Minister]] for the second time.<ref>{{cite web|first=Ben|last=Johnson|title=Prime Ministers of Britain|url=http://www.historic-uk.com/HistoryUK/England-History/PrimeMinisters.htm|access-date=2013-08-14}}</ref>
* [[April 19]] – The [[Prime Minister of Sweden]], [[Louis Gerhard De Geer|Louis De Geer]], resigns over the defeat of a defense reform bill in the country's [[Riksdag]]; he is succeeded by Count [[Arvid Posse]] (1880–1883).
* [[April 27]] – The [[Royal University of Ireland]] is founded by charter, allowing the [[Catholic University of Ireland]] to re-form as [[University College Dublin]].
* [[May 2]] – After having her lights installed by Edison's personnel, the [[SS Columbia (1880)|SS ''Columbia'']] is lit up for the first time at the foot of [[Wall Street]], in New York City.
* [[May 13]] – In [[Menlo Park, New Jersey]], [[Thomas Edison]] performs the first test of his [[electric railway]].
* [[June]] – The [[SS Columbia (1880)|SS ''Columbia'']] sets off on her maiden voyage around [[Cape Horn]] to [[Portland, Oregon]], carrying 13 locomotives and 200 railcars.
* [[June 1]]  – [[Tinius Olsen]] is awarded a United States Patent, for the Little Giant Testing Machine.
* [[June 28]] – [[Australia]]n police capture bank robber [[Ned Kelly]], after a gun battle at [[Glenrowan, Victoria]].
* [[June 29]] – France annexes [[Tahiti]].