1351

Year 1351 (MCCCLI) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar.

January–December

 * January 14 – Edward III of England institutes the Treason Act 1351, defining treason in English law. It remains unrepealed into the 21st century.
 * February – The Statute of Labourers is enacted by the Parliament of England, to deal with a labour shortage caused by the Black Death.
 * March 4 – The Ayutthaya Kingdom is established by King Uthong (Ramathibodi I) in modern-day Thailand. He begins to propagate Theravada Buddhism as the state religion.
 * March 23 – Firuz Shah Tughlaq succeeds Mohammad Tughlaq as ruler of the Delhi Sultanate. At this time, the Samma dynasty in Sindh (part of modern-day Pakistan) breaks away from the Sultanate.
 * March 26 – War of the Breton Succession: Combat of the Thirty – Thirty chosen knights each, from the Kingdoms of France and England, fight to determine who will rule the Duchy of Brittany; a Franco-Breton victory is assured by the squire Guillaume de Montauban.
 * April 1 – Hundred Years' War: Battle of Saintes. – The French are defeated by the English.
 * April 8 – Hundred Years' War: Battle of Taillebourg. – The French are defeated by the English.
 * May 1 – Zürich joins the Old Swiss Confederacy.
 * November 26 – Emperor Sukō abdicates as 3rd Emperor of the Northern Court of Japan.

Date unknown

 * The Red Turban Rebellions break out in China, leading to permanent weakening of the Mongolian-run Yuan dynasty.
 * King Gongmin ascends the throne in Goryeo.
 * The region of Vantaa in Finland is first mentioned (as Helsinge).

Births

 * October 16 – Gian Galeazzo Visconti, first Duke of Milan (d. 1402)
 * November 1 – Leopold III, Duke of Austria (d. 1386)
 * Princess Joan of France (d. 1371)
 * probable – Władysław II Jagiełło, Grand Duke of Lithuania and King of Poland (d. 1434)

Deaths

 * February 13 – Kō no Morofuyu, Japanese general
 * March 20 – Muhammad bin Tughluq, Sultan of Delhi
 * March 25
 * Kō no Moronao, Japanese samurai
 * Kō no Moroyasu, Japanese samurai
 * May 24 – Abu al-Hasan Ali ibn Othman, Sultan of Morocco (b. 1297)
 * June 20 – Margareta Ebner, German nun (b. 1291)
 * November 15 – Joanna of Pfirt, duchess consort of Austria