Wikipedia:Selected anniversaries/December 27
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: 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.
- 1657 – Citizens of New Netherland presented the Flushing Remonstrance to Director-General Peter Stuyvesant, requesting an exemption to his ban on Quaker worship.
- 1922 – The Imperial Japanese Navy commissioned Hōshō (pictured), the world's first purpose-built aircraft carrier.
- 1949 – Indonesian National Revolution: Queen Juliana of the Netherlands signed papers that relinquished sovereignty of most of the Dutch East Indies, officially recognising the independence of Indonesia.
- 1978 – Juan Carlos I of Spain promulgated a new constitution after it was passed by a referendum on December 6, marking the culmination of the Spanish transition to democracy.
- 2004 – Radiation from an explosion on the magnetar SGR 1806-20 reached Earth, the most magnetic object ever perceived by mankind, with a magnetic field of over 1015 gauss in intensity.