Wikipedia:Selected anniversaries/December 27

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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.

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Ineligible

Blurb Reason
1845John L. O'Sullivan, in his newspaper the New York Morning News, argued that the United States had the right to claim the entire Oregon Country "by the right of our manifest destiny", popularizing the term's use. Too much uncited, excessive quotes yellow tag
1911 – "Jana Gana Mana", the national anthem of India, was first sung in the Calcutta Session of the Indian National Congress. clarify section
1927Show Boat, considered to be the first truly American musical, opened at the Ziegfeld Theatre on Broadway. refimprove section
1945 – The international ratification of the Bretton Woods Agreement established the International Monetary Fund and International Bank for Reconstruction and Development. refimprove sections
1949Indonesian 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. appears on August 17
1966 – A group of three men made the first descent into the Cave of Swallows (pictured), the largest known cave shaft in the world, in Aquismón, Mexico. Article says that the first decent happened in April 1967.
1978Juan 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. refimprove section, multiple expand section
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. refimprove
2009 – During protests in Tehran against the recent presidential election, Iranian security forces opened fire on demonstrators on the Day of Ashura. POV-section
George Cayley |b|1773| Sourcing

Eligible

Notes

December 27

Japanese aircraft carrier Hōshō
Japanese aircraft carrier Hōshō
More anniversaries: