August 18
day of the year

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.
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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.