Centuries: 13th century - 14th century - 15th century
- March – The treaty between England and France is extended until April of 1377.
- April 28 - The Good Parliament in England begins.
- June 7 – The dying Prince Edward summons his father Edward III and brother John of Gaunt and makes them swear to uphold the claim to the throne of his son Richard.
- July 10 – The Good Parliament, the longest Parliament which has yet sat in England, is dissolved.
- August 12 - Andronicus Palaeologus, son of John V Palaeologus, enters Constantinople and takes his father prisoner.
- September? – John of Gaunt summons John Wycliffe from Oxford to appear before the king’s council, intending to use him against bishops who have become Gaunt’s enemies.
- Fall - John of Gaunt, through the royal council, proceeds to undo the work of the Good Parliament.
- December 25 – John of Gaunt presents his nephew prince Richard of Bordeaux to the feudatories of the realm and swears to uphold his right to succeed Edward III.
- Moghulistan khan Qamar al-din invades Timur’s easter province of Farghana. Tiimur is almost defeated, but manages to turn the tide against his foes and drive them back into their own country.
- Catherine of Siena visits Pope Gregory XI in Avignon, convincing him to move the Papacy back to Rome
- Olaf IV of Norway becomes King of Denmark (as Olaf III of Denmark)
- Sredets, Bulgaria, is renamed Sofia
- Late in year - Timur] leads his army against troops of the White Horde which have arrived at Sighnaq. However, winter has set in, precluding the possibility of an immediate battle.
- December 25 – Geoffrey Chaucer goes abroad on secret state business in the company of Sir John Burley.