This is a list of selected November 23 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.
November 23: Labour Thanksgiving Day in Japan; St George's Day in Georgia
- 1867 – The Manchester Martyrs were hanged in Manchester, England, for killing a police officer during their rescue from jail of two Irish nationalists, who played important roles in the failed Fenian Rising.
- 1963 – The first episode of Doctor Who was broadcast on BBC television with William Hartnell in the title role, starting a programme that eventually became the world's longest-running science fiction television show.
- 1971 – The People's Republic of China was given China's permanent seat on the United Nations Security Council.
- 1980 – An earthquake struck the Irpinia region of Italy, killing 2,914 people, injuring more than 10,000 and leaving 300,000 homeless.
- 2007 – MS Explorer (pictured) became the first cruise ship to sink in the Antarctic Ocean.
- 2009 – At least 57 people, including 34 journalists, were killed in the Maguindanao massacre in the Philippines.