This is a list of selected September 18 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, featured list or picture of the day.
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Daniel David Palmer- Dag Hammarskjöld
Bust of Nerva
Ineligible
| Blurb | Reason |
|---|---|
| 1810 – Patria Vieja, the first stage of the Chilean War of Independence, began. | no footnotes |
| 1931 – Mukden Incident: A section of the Japanese-built South Manchuria Railway was destroyed, providing an excuse for the Japanese to blame the act on Chinese dissidents, and thus giving a pretext for the Japanese occupation of Manchuria. | not neutral, refimprove |
| 1961 – En route to negotiate a ceasefire between Katanga troops and United Nations forces, the plane carrying UN Secretary-General Dag Hammarskjöld crashed under mysterious circumstances near Ndola in Northern Rhodesia, killing him and 15 others on board. | refimprove section, cleanup required |
| 1998 – The Internet Corporation for Assigned Names and Numbers (ICANN), a nonprofit organization that manages the assignment of domain names and IP addresses in the Internet, was established. | tagged for expansion |
Eligible
- 96 – Following the assassination of Roman Emperor Domitian, the Roman Senate appointed Nerva (bust pictured), the first of the Five Good Emperors, to succeed him.
- 1809 – The second theatre of the Royal Opera House in London opened after a fire destroyed the original theatre one year earlier.
- 1850 – The United States Congress passed the Fugitive Slave Act, which declared that all runaway slaves be brought back to their masters.
- 1851 – The New York Times, the largest metropolitan newspaper in the United States, was founded.
- 1870 – Nathaniel P. Langford of the Washburn–Langford–Doane Expedition first observed a geyser in Wyoming Territory erupting a regular intervals and named in Old Faithful.
- 1873 – Panic of 1873: The American bank Jay Cooke & Company declared bankruptcy, setting off a chain reaction of bank failures.
- 1895 – Daniel David Palmer gave the first chiropractic adjustment to deaf janitor Harvey Lillard.
- 1947 – The National Security Act came into effect, establishing the United States Air Force as a separate branch of the U.S. military.
September 18: National Day in Chile
- 324 – Constantine the Great decisively defeated Licinius in the Battle of Chrysopolis, establishing Constantine's sole control over the Roman Empire, and ending the Tetrarchy.
- 1879 – The Blackpool Illuminations (modern example pictured) in the English seaside town of Blackpool, billed as "the greatest free light show on earth", were switched on for the first time.
- 1939 – The Nazi propaganda radio programme Germany Calling began broadcasting to audiences in the United Kingdom and the United States.
- 1974 – Hurricane Fifi struck Honduras, destroying 182 towns and villages in the first 24 hours, and ultimately causing over 8,000 deaths.
- 2001 – Five letters containing anthrax spores were mailed to various media outlets in the United States.
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