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August 18

day of the year

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionAug 22, 2026
Entity authorityQ2826
Source-derived summary

August 18 is the 230th day of the year (231st in leap years) in the Gregorian calendar; 135 days remain until the end of the year.

Events

Pre-1600

684 – Battle of Marj Rahit: Umayyad partisans defeat the supporters of Ibn al-Zubayr and cement Umayyad control of Syria.

707 – Princess Abe accedes to the imperial Japanese throne as Empress Genmei.

1136 – Following the surrender of Baghdad, Seljuk Sultan Mas'ud replaces Abbasid caliph Al-Rashid Billah with his uncle Al-Muqtafi.

1304 – The Battle of Mons-en-Pévèle is fought to a draw between the French army and the Flemish militias.

1487 – The Siege of Málaga ends with the taking of the city by Castilian and Aragonese forces.

1492 – The first grammar of the Spanish language (Gramática de la lengua castellana) is presented to Queen Isabella I.

1572 – The Huguenot King Henry III of Navarre marries the Catholic Margaret of Valois, ostensibly to reconcile the feuding Protestants and Catholics of France.

1590 – John White, the governor of the Roanoke Colony, returns from a supply trip to England and finds his settlement deserted.

1601–1900

1612 – The trials of the Pendle witches and Samlesbury witches, one of England's most famous witch trials, begin at the Lancaster Assizes.

1634 – Father Urbain Grandier, accused and convicted of sorcery, is burned alive in Loudun, France.

Editorial summary

Begin with the source’s own compact description: “August 18” is day of the year. The dossier treats that line as a proposition to test through August and year, not as a finished interpretation.

Editorial reviewA practical starting point whose main value is the path it opens into stronger specialist and primary sources. The current lead gives the account dated anchors—1600, 1136, 1304, 1487—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, August and year is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “day of the year” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Aug 22, 2026. The linked authority identifier is Q2826. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1600, 1136, 1304 and 1487.

Critical limits

A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. 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.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

Best used for
  • Subject orientation
  • Search vocabulary
  • Locating named sources
Verify next

The closest primary source, responsible institution and strongest cited specialist reference.

Three-step research path

  1. Establish the record: confirm the title “August 18”, its source revision and the description used here.
  2. Expand the search: follow August 18 primary sources, August 18 archive and August research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “August 18”?
  2. What terminology or title could unlock a more precise catalogue search?
  3. Which cited source is closest to the event, object or claim?
Subject index

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Source & attribution

This entry incorporates text from August 18” 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.