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
GNU logo
Bali Tiger
Dawn mission patch
Ford Model T
Rosetta Stone
Aung San Suu Kyi
Locomotion No. 1 at the Darlington Railway Centre and Museum
Lij Iyasu of Ethiopia
Ineligible
| Blurb | Reason |
|---|---|
| World Tourism Day | no footnotes |
| 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 |
| 1605 – Polish–Swedish War: The Battle of Kircholm ended in the decisive victory of Polish–Lithuanian forces, and is remembered as one of the greatest triumphs of Commonwealth cavalry. | unreferenced section |
| 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. | refimprove section |
| 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. | Annus Mirabilis: refimprove section; Mass-energy: refimprove sections |
| 1937 – The Bali tiger, a small subspecies of tiger found solely on the small Indonesian island of Bali, was officially declared extinct. | Date not mentioned in article, and conflicting dates given. |
| 1930 – With his victory in the U.S. Amateur Championship, Bobby Jones (pictured) became the only person ever to complete a Grand Slam in golf. | Lots of citations needed, and date ref is a deadlink |
| 1962 – Silent Spring by Rachel Carson was first published, and went on to inspire an environmental movement that led to the creation of the U.S. Environmental Protection Agency. | section needs rewrite |
| 1993 – War in Abkhazia: After capturing the city of Sukhumi, Abkhaz separatists and their allies massacred large numbers of Georgian civilians. | lots of {{cn}} tags (8) |
| 2007 – NASA launched the Dawn probe, its first purely exploratory mission to use ion propulsion, from Cape Canaveral. | too many images |
| 2008 – During the Shenzhou 7 mission, Zhai Zhigang became the first Chinese citizen to carry out a spacewalk. | appears on September 25 |
| 2001 – The Jagadguru Rambhadracharya Handicapped University, the only university in the world exclusively for disabled people, was founded in Chitrakoot, India. | unreliable sources |
| Avril Lavigne |b|1984| | outdated, unreferenced section |
Eligible
- 1822 – In a letter to the Académie des Inscriptions et Belles-Lettres in Paris, Jean-François Champollion announced his initial successes in deciphering Egyptian hieroglyphs on the Rosetta Stone (pictured).
- 1825 – Locomotion No. 1 hauled the train on the opening day of the Stockton and Darlington Railway, the first public railway in the world to use steam locomotives.
- 1851 – The British East India Company inaugurated the Horsburgh Lighthouse on the rocky outcrop of Pedra Branca, Singapore, which later became the subject of a territorial dispute.
- 1854 – The paddle steamer SS Arctic sank after a collision with SS Vesta 50 miles (80 km) off the coast of Newfoundland, killing approximately 320 people.
- 1908 – The first production Ford Model T, the car credited with initiating the mass use of automobiles in the United States, was completed at the Ford Piquette Avenue Plant in Detroit, Michigan.
- 1916 – Lij Iyasu (pictured), the emperor-designate of Ethiopia, was deposed in favor of his aunt Zewditu.
- 1917 – The Broadhurst Theatre opened in New York City with a performance of Misalliance by George Bernard Shaw.
- 1941 – SS Patrick Henry, the first of 2,710 Liberty ships built during World War II by the United States, was launched.
- 1964 – The British Aircraft Corporation TSR-2, an advanced Cold War tactical strike and reconnaissance aircraft that was later cancelled, made its maiden flight.
- 1975 – Two members of ETA political-military and three members of the Revolutionary Antifascist Patriotic Front, sentenced to death for murder, became the last people to be executed in Spain.
- 1981 – Iran–Iraq War: Iran broke the Iraqi siege of Abadan by Operation Samen-ol-A'emeh.
- 1983 – American software developer Richard Stallman announced plans for the Unix-like operating system GNU, the first free software developed by the GNU Project.
- 1988 – Led by pro-democracy activist Aung San Suu Kyi (pictured), the political party National League for Democracy was founded in Burma.
- 1996 – The Taliban drove Afghan President Burhanuddin Rabbani out of Kabul, tortured and murdered former president Mohammad Najibullah, and established the Islamic Emirate of Afghanistan.
- Born/died this day: | Felice della Rovere |d|1536| Flaminio Scala |b|1552| Alphonsus Liguori |b|1696| Michael Huber |b|1727| William Rulofson |b|1826| Bernard Courtois |d|1837| Braxton Bragg |d|1876| Edgar Degas |d|1917| Bud Powell|b|1924| Franz Grundheber |b|1937|d|2025| Sylvia Pankhurst |d|1960| Asashōryū Akinori |b|1980| Jenna Ortega |b|2002| Kenji Nagai |d|2007| Alexey Davydov |d|2013| Mauricio González-Gordon y Díez |d|2013|
September 27: Gold Star Mother's Day in the United States (2026); Meskel (Orthodox Tewahedo)
Flag of China
- 1422 – The Treaty of Melno was signed, establishing the Prussian–Lithuanian border, which afterwards remained unchanged for about 500 years.
- 1875 – The merchant ship Ellen Southard was wrecked in a storm at Liverpool, England; the U.S. Congress subsequently awarded 27 Gold Lifesaving Medals to the men who rescued her crew.
- 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.
- 1949 – Members of the Chinese People's Political Consultative Conference unanimously selected Zeng Liansong's design for the flag of China (pictured).
- 2014 – Mount Ontake in central Japan unexpectedly erupted, killing 63 people in the nation's deadliest eruption in more than 100 years.
- Guillaume Rondelet (b. 1507)
- Ivan Goncharov (d. 1891)
- Gwyneth Paltrow (b. 1972)
- Madeleine Tchicaya (d. 2021)
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