Editing 1969 (section)

===April===
{{Main|April 1969}}
* [[April 3]] – The [[Mass of Paul VI]] is [[Promulgation (Catholic canon law)|promulgated]] in the [[Catholic Church]] by the Pope.<ref>''[[Missale Romanum (apostolic constitution)|Missale Romanum]]''.</ref>
* [[April 4]] – [[Denton Cooley]] implants the first temporary [[artificial heart]].
* [[April 7]] – [[request for comments | RFC]] series begins with Network Working Group RFC 1 on [[ARPANET]] host software.
* [[April 8]] – The [[Montreal Expos]] become [[Major League Baseball]]'s first team outside the United States.
* [[April 9]] – Fermín Monasterio Pérez is murdered by the [[ETA (separatist group)|ETA]] in [[Biscay]], [[Spain]]; the 4th victim in the name of [[Basque nationalism]].
* [[April 15]] – The [[EC-121 shootdown incident]]: [[North Korea]] shoots down a US reconnaissance aircraft over the [[Sea of Japan]], killing all 31 on board.<ref>{{cite book |last=Larson |first=George A. |year=2001 |title=Cold war shoot downs: Part two |work=Air Classics |publisher=Challenge Publications Inc.}}</ref>
* [[April 17]] – [[Sirhan Bishara Sirhan]] is found guilty of the assassination of Robert F. Kennedy.
* [[April 20]] – British troops arrive in [[Northern Ireland]] to reinforce the [[Royal Ulster Constabulary]].
* [[April 22]] – English sailor [[Robin Knox-Johnston]] becomes the first person to sail around the world solo without stopping.
* [[April 28]] – [[Charles de Gaulle]] steps down as president of [[France]] after suffering defeat in a [[1969 French constitutional referendum|referendum the day before]].