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1340 (MCCCXL) was a leap year starting on Saturday of the Julian calendar, the 1340th year of the Common Era (CE) and Anno Domini (AD) designations, the 340th year of the 2nd millennium, the 40th year of the 14th century, and the 1st year of the 1340s decade. As of the start of 1340, the Gregorian calendar was 8 days ahead of the Julian calendar, which was the dominant calendar of the time.
Events
- Europe has about 74 million inhabitants.
- January 26 – King Edward III of England is declared King of France
- June 24 – The Battle of Sluys is fought between the naval fleets of the Kingdom of England and the Kingdom of France. The former was under the command of Edward III of England and the latter under those of admiral Hue Quiéret and treasurer Nicholas Béhuchet assisted by Genoese mercenary galleys serving under Egidio Bocanegra. The battle ends with the almost complete destruction of the French. Both their commanders were among the casualties. However the mercenaries manage to escape.
- A son of deceased King Christopher II of Denmark is elected to the throne following eight years of Interregnum. He will reign as Valdemar IV of Denmark.