1379

Year 1379 (MCCCLXXIX) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar.

January–December

 * May 29 – John I succeeds his father, Henry II, as King of Castile and King of León.
 * June 30 – New College, Oxford, is founded in England by William of Wykeham, Bishop of Winchester.
 * July 1 – Forces of the Republic of Venice and Ottoman Turks, having invaded Constantinople, restore John V Palaiologos as Byzantine co-emperor. Andronikos IV Palaiologos is allowed to remain as co-emperor, but is confined to the city of Silivri for the remainder of his life.
 * September 9 – The Treaty of Neuberg is signed, splitting the Austrian Habsburg lands between brothers Albert III and Leopold III. Albert III retains the title of Duke of Austria.

Date unknown

 * Bairam Khawaja establishes the independent principality of the Kara Koyunlu (Turkomans of the Black Sheep Empire), in modern-day Armenia.
 * Dmitry Donskoy of Moscow raids Estonia.
 * In the Hundred Years' War, the French lose control of most of Brittany to the English.
 * Wisbech Grammar School is founded in England.
 * Timur conquers the Sufid Dynasty of Khwarazm

Births

 * October 4 – King Henry III of Castile (d. 1406)
 * date unknown
 * Jerome of Prague, Hussite (d. 1416)
 * Empress Zhang (Hongxi) of China (d. 1442)

Deaths

 * February 18 – Albert II of Mecklenburg (b. c. 1318)
 * May 29 – King Henry II of Castile (b. 1333)
 * November 15 – Otto V, Duke of Bavaria (b. 1346)
 * December 16 – John Fitzalan, Marshal of England (drowned)
 * date unknown – Aqsara'i, Persian physician