This is a list of selected September 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. Before doing so, please review the selected anniversaries guidelines. If your suggestion is potentially controversial or relates to a day currently or soon to appear on the Main Page, post it on the talk page instead.
Please note:
- Events listed on the Main Page are selected based on article quality and to provide a diverse range of topics, rather than solely on the importance or significance of the events.
- Only four or five events are featured each day; therefore, not all important or significant events can be included.
- An event is generally excluded if it is already the subject of the scheduled featured article or picture of the day.
To report an error in content currently on the Main Page, see Wikipedia:Main Page/Errors. If a listed event is inaccurate, please first seek consensus and update the corresponding article before making changes here.
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Regimini militantis Ecclesiae
Albert Einstein
St. Ignatius of Loyola, S.J., Founder of the Society of Jesus- Richard M Stallman
GNU logo- Bali Tiger
Ford Model T
Ineligible
| Blurb | Reason |
|---|---|
| 1540 – Pope Paul III issued the papal bull Regimini militantis, approving the formation of the Society of Jesus, a Christian religious order of the Roman Catholic Church, by St. Ignatius of Loyola. | already featured on August 15 |
| 1825 – Locomotion No. 1 hauled the first train on opening day of the Stockton and Darlington Railway, the world's first publicly subscribed passenger railway. | refimprove |
| 1903 – The Old 97, a Southern Railway train, derailed near Danville, Virginia, inspiring a famous railroad ballad. | Needs more footnotes |
| 1905 – The physics journal Annalen der Physik published Albert Einstein's fourth Annus Mirabilis paper "Does the Inertia of a Body Depend Upon Its Energy Content?", which introduced the equation E = mc2. | unreferenced sections |
| 1937 – The Bali tiger, a small subspecies of tiger found solely on the small Indonesian island of Bali, was officially declared extinct. | unreferenced section |
| 1940 – World War II: Nazi Germany, Fascist Italy and the Empire of Japan signed the Tripartite Pact in Berlin, officially forming a military alliance known as the Axis powers. | refimprove |
| 1983 – Software developer Richard Stallman announced plans for the Unix-like GNU operating system, the first free software developed by the GNU Project. | needs 3rd-party sources |
Eligible
- 1777 – American Revolutionary War: Lancaster, Pennsylvania, became the capital of the United States for one day as members of the Continental Congress fled Philadelphia, which had been captured by the British.
- 1908 – The first production of the Ford Model T automobile was built at the Piquette Plant in Detroit.
- 1941 – SS Patrick Henry, the first of 2,751 Liberty ships built during World War II by the United States, was launched.
- 1993 – War in Abkhazia: After capturing the city of Sukhumi, Abkhaz separatists and their allies massacred large numbers of Georgian civilians.
- 2008 – During the Shenzhou 7 mission, Zhai Zhigang became the first Chinese citizen to carry out a spacewalk.
September 27: World Tourism Day; Meskel in Ethiopia and Eritrea
- 1422 – The Treaty of Melno was signed, establishing the Prussian–Lithuanian border, which afterwards remained unchanged for about 500 years.
- 1916 – Lij Iyasu (pictured), the emperor-designate of Ethiopia, was deposed in favor of his aunt, Zewditu.
- 1988 – Led by pro-democracy activist Aung San Suu Kyi, the political party National League for Democracy was founded in Burma.
- 1996 – The Taliban drove Afghan President Burhanuddin Rabbani out of Kabul and established the Islamic Emirate of Afghanistan.
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