This is a list of selected December 27 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, featured list 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.
December 27: Tenth of Tevet (Judaism, 2009); Day of Ashura (Islam, 2009); St. Stephen's Day in Eastern Christianity
- 537 – The current Hagia Sophia building in Istanbul, originally built as a church before it later became a mosque in 1453 and then a museum in 1935, was inaugurated.
- 1831 – Aboard HMS Beagle, Charles Darwin left Plymouth, England, on what became a historic expedition to South America that made his name as a naturalist.
- 1904 – Scottish author and dramatist J. M. Barrie's stage play Peter Pan, or The Boy Who Wouldn't Grow Up, about a mischievous little boy who can fly, premiered in London.
- 1918 – A public speech by famed Polish pianist Ignacy Jan Paderewski (pictured) in Poznań sparked the Greater Poland Uprising against Germany.
- 2007 – Former Prime Minister of Pakistan Benazir Bhutto was assassinated while she was leaving a political rally of Pakistan Peoples Party supporters at Liaquat National Bagh in Rawalpindi, Pakistan.