February 2 – The Catalonia earthquake takes place in the Catalonian region of Spain during Candlemas, estimated later at 6.5 magnitude, with extreme damage to the city of Roussillon and to the village of Queralbs. The quake collapses a church in Puigcerdà, killing more than 100 people, and 1,000 overall.
The Fifth Parliament of King Henry VI of England closes its session, as the King grants royal assent to the Commissioners of Sewers Act 1427, the Wages of Artificers Act granting the justices of peace power to "assign the wages of artificers and workmen by proclamation", and the Assizes Act and the Exigent on Indictment Act which both set statutes of limitation on certain proceedings.
March 27 – Casimir V, Duke of Pomerania becomes the sole ruler of Pomerania-Stettin in Germany upon the death of his brother, Otto II, after the two had ruled jointly since 1413.
April 22 – After an attack by the Ottoman Empire on Venetian outposts on the Greek island of Euboea, the Republic of Venice, presided over by the Doge Francesco Foscari, authorizes Admiral Andrea Mocenigo to organize 15 warships to hunt and destroy the Ottoman raiders.
April 29 – The coronation of the Vietnamese rebel leader Le Loi as the King of Dai Viet takes place in Hanoi (at the time referred to as Thang Long). King Le Loi renames the Viet capital as "Dong Kinh".
May 13 – Joan of Arc makes her first attempt to reach the Armagnac court at Chinon, arriving at Vaucouleurs speaking to Robert de Baudricourt, captain of the royal garrison, and tells him that God told her in a vision that she had a mission to help restore the Dauphin Charles to the throne. Baudricourt initially declines her request to be given an escort to visit Charles in person.
June 15 – In second bombardment of Copenhagen by the Hanseatic League, all but three of the Danish Navy's ships are destroyed by the Hanseatic cannons, capable of shooting aartillery at greater distances than Denmark is technologically capable of achieving.
July–September
July 3 – The Treaty of Delft is signed by the Countess Jacqueline of Holland as a surrender to Philip, Duke of Burgundy to end the siege of Gouda by the Cod Forces against Holland, Zeeland and Hainaut during the Hook and Cod Wars. Under the pact, Jacqueline retains her title and nominal powers, but Philip administers the government and the right to inherit control.
October 21 – Siege of Orléans: After four days of bombardment, English troops attempt an assault on the boulevart of the city walls but the French defenders hold the attackers back with missile fire, rope nets, scalding oil, hot coals and quicklime. p.383
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