September 4
day of the year
September 4 is the 247th day of the year (248th in leap years) in the Gregorian calendar; 118 days remain until the end of the year.
Events
Pre-1600
476 – Romulus Augustulus is deposed when Odoacer proclaims himself "King of Italy", thus ending the Western Roman Empire.
626 – Li Shimin, posthumously known as Emperor Taizong of Tang, assumes the throne over the Tang dynasty of China.
929 – Battle of Lenzen: Slavic forces (the Redarii and the Obotrites) are defeated by a Saxon army near the fortified stronghold of Lenzen in Brandenburg.
1260 – The Sienese Ghibellines, supported by the forces of Manfred, King of Sicily, defeat the Florentine Guelphs at Montaperti.
1282 – Peter III of Aragon is proclaimed King of Sicily in Palermo.
1479 – The Treaty of Alcáçovas is signed by the Catholic Monarchs of Castile and Aragon on one side and Afonso V and his son, Prince John of Portugal.
1601–1900
1607 – The Flight of the Earls takes place in Ireland (14 September N.S.).
1666 – In London, England, the most destructive damage from the Great Fire occurs.
1746 – The Treaty of Kerden concludes the Ottoman–Persian War (1743–1746).
The public source identifies “September 4” as day of the year. This brief keeps that definition visible, then builds a research path around September and year.
Why this record matters
A short description can identify a subject without explaining its stakes. For “September 4”, the useful work is to connect “day of the year” to the records capable of establishing context and consequence.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 9, 2026. The linked authority identifier is Q2855. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1600, 1260, 1282 and 1479.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “September 4” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.