1380

Year 1380 was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar.

Events

*February - Olaf II of Denmark becomes Olaf IV of Norway, with his mother Margaret as regent. Iceland and the Faroe Islands, as a parts of Norway, pass under the Danish crown.
* May 31 – Grand Duke of Lithuania Jogaila signs the secret Treaty of Dovydiškės with the Teutonic Knights. This sparks a civil war with his uncle Kęstutis.
*July 27 - Henry Bolingbroke marries Mary de Bohun at Arundel Castle.
* September 8 - Battle of Kulikovo: Russian forces under Grand Prince Dmitri Donskoi of Moscow resist a large invasion by the Blue Horde, Lithuania and Ryazan, stopping their advance at Kulikovo.
* September 16 - Charles V of France is succeeded by his twelve year old son, Charles VI.
*Sir William Walworth, a member of the Fishmongers Guild, becomes Lord Mayor of London for the second time.
* Khan Tokhtamysh of the White Horde dethrones Khan Mamai of the Blue Horde. The two hordes unite to form the Golden Horde.
* The Hongwu Emperor purges the chancellor of China, Hu Weiyong, and abolishes that office as he imposes direct imperial rule over the six ministries of central government for the Ming Empire.

Births

* February 11 - Gian Francesco Poggio Bracciolini, Italian humanist (d. 1459)
* September 8 - Saint Bernardino of Siena, Italian Franciscan missionary (d. 1444)
*November 27 - King Ferdinand I of Aragon (d. 1416)
*"date unknown"
**Giovanni Berardi, Archbishop of Tarentum (d. 1449)
**Nguyễn Trãi, Confucian scholar (d. 1442)
**Jan Želivský, Hussite priest (d. 1422)
*"probable"
**Jamshīd al-Kāshī, Persian astronomer and mathematician (d. 1429)
**Thomas à Kempis, German monk and writer (d. 1471)

Deaths

*February - Haakon VI of Norway (b. 1340)
*April 29 - Saint Catherine of Siena, Italian theologian (b. 1347)
*May 5 - Saint Philotheos, Coptic martyr
*July 13 - Bertrand du Guesclin, Constable of France (b. c. 1320)
*July 26 - Komyo, former Emperor of Japan (b. 1322)
*September 16 - King Charles V of France (b. 1338)
*December 29 - Elizabeth of Poland, queen consort of Hungary (b. 1305)
*"date unknown"
**Nissim of Gerona, rabbi (b. 1320)
**Shams al-Dīn Abū Abd Allāh al-Khalīlī, Syrian astronomer (b. 1320)