Editing 1903 (section)

===April===
{{Main|April 1903}}
[[File:Frank Slide 4-30-1903.jpg|thumb|right|April 29: The [[Frank Slide]] occurs]]
*[[April 19]]&ndash;[[April 21|21]] ([[April 6]]&ndash;[[April 8|8]] [[Adoption of the Gregorian calendar|O.S.]]) &ndash; The first [[Chișinău pogrom (1903)|Kishinev pogrom]], beginning on Easter Day, takes place in [[Chișinău|Kishinev]], capital of the [[Bessarabia Governorate]] of the [[Russian Empire]]. At least 47 Jews are killed during mob rioting encouraged by [[blood libel]] articles in the press and led by priests.<ref>{{Cite Jewish Encyclopedia |title=Kishinef (Kishinev) |url=http://www.jewishencyclopedia.com/articles/9350-kishinef-kishinev |first1=Herman|last1=Rosenthal |first2=Max|last2=Rosenthal|}}</ref> 
* [[April 26]] &ndash; [[Atlético Madrid]] is founded as a professional association football club in [[Spain]].<ref>{{Cite news|url=http://www.atleticofans.com/club-history/|title=Atletico Madrid Club History|newspaper=AtleticoFans|language=en-US|access-date=2017-01-16|archive-date=February 15, 2017|archive-url=https://web.archive.org/web/20170215181521/http://www.atleticofans.com/club-history/|url-status=live}}</ref>
* [[April 29]]
**The 30-million-m<sup>3</sup> [[Frank Slide]] rockslide kills 70–90 in [[Frank, Alberta]].
**The 7.0 {{M|s}} [[1903 Manzikert earthquake|Manzikert earthquake]] affects eastern Turkey, leaving 3,500 dead.