Wikipedia:Selected anniversaries/April 12
This is a list of selected April 12 anniversaries that appear in the "On this day" section of the Main Page. To suggest a new item, in most cases, you can be bold and edit this page. Please read the selected anniversaries guidelines before making your edit. However, if your addition might be controversial or on a day that is or will soon be on the Main Page, please post your suggestion on the talk page instead.
Please note that the events listed on the Main Page are chosen based more on relative article quality and to maintain a mix of topics, not based solely on how important or significant their subjects are. Only four to five events are posted at a time and thus not everything that is "most important and significant" can be listed. In addition, an event is generally not posted this year if it is also the subject of the scheduled featured article or picture of the day.
To report an error when this appears on the Main Page, see Main Page errors. Please remember that this list defers to the supporting articles, so it is best to achieve consensus and make any necessary changes there first.
April 12: Yom HaShoah (2010); Cosmonautics Day in Russia; Yuri's Night
- Union Flag (pictured) to symbolise the Union of the Crowns, merging the designs of the Flag of England and the Flag of Scotland.
- 1861 – Confederate forces began firing at Fort Sumter in the harbor of Charleston, South Carolina, starting the American Civil War.
- communists from the nationalist Kuomintang began in Shanghai.
- 1961 – Aboard Vostok 3KA-2, Soviet cosmonaut Yuri Gagarin became the first man to enter outer space, completing one orbit in a time of 108 minutes.
- artificial leg in the Atlantic Ocean at St. John's, Newfoundland, and began running his "Marathon of Hope" towards the Pacific Ocean at Vancouver, British Columbia, to raise funds across Canada for cancer research.