June 12
day of the year
June 12 is the 163rd day of the year (164th in leap years) in the Gregorian calendar; 202 days remain until the end of the year.
Events
Pre-1600
910 – Battle of Augsburg: The Hungarians defeat the East Frankish army under King Louis the Child, using the famous feigned retreat tactic of the nomadic warriors.
1042 – Constantine IX Monomachos is crowned as Byzantine Emperor, one day after his marriage to Empress Zoe Porphyrogenita.
1206 – The Ghurid general Qutb ud-Din Aibak founds the Delhi Sultanate.
1240 – At the instigation of Louis IX of France, an inter-faith debate, known as the Disputation of Paris, starts between a Christian monk and four rabbis.
1381 – Peasants' Revolt: In England, rebels assemble at Blackheath, just outside London.
1418 – Armagnac–Burgundian Civil War: Parisians slaughter sympathizers of Bernard VII, Count of Armagnac, along with all prisoners, foreign bankers, and students and faculty of the College of Navarre.
1429 – Hundred Years' War: On the second day of the Battle of Jargeau, Joan of Arc leads the French army in their capture of the city and the English commander, William de la Pole, 1st Duke of Suffolk.
1550 – The city of Helsinki, Finland (belonging to Sweden at the time) is founded by King Gustav I of Sweden.
1601–1900
1643 – The Westminster Assembly is convened by the Parliament of England, without the assent of Charles I, in order to restructure the Church of England.
The public source identifies “June 12” as day of the year. This brief keeps that definition visible, then builds a research path around June and year.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Aug 22, 2026. The linked authority identifier is Q2619. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1600, 1042, 1206 and 1240.
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This entry incorporates text from “June 12” 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.