From Infogalactic: the planetary knowledge core
|Centuries:||13th century – 14th century – 15th century|
|Decades:||1350s 1360s 1370s – 1380s – 1390s 1400s 1410s|
|Years:||1384 1385 1386 – 1387 – 1388 1389 1390|
|1387 by topic|
|State leaders - Sovereign states|
|Birth and death categories|
|Births - Deaths|
|Establishments and disestablishments categories|
|Establishments - Disestablishments|
|Art and literature|
|1387 in poetry|
|Ab urbe condita||2140|
|English Regnal year||10 Ric. 2 – 11 Ric. 2|
|Chinese calendar||丙寅年 (Fire Tiger)
4083 or 4023
— to —
丁卯年 (Fire Rabbit)
4084 or 4024
|- Vikram Samvat||1443–1444|
|- Shaka Samvat||1309–1310|
|- Kali Yuga||4488–4489|
|Japanese calendar||Shitoku 4 / Kakei 1
|Minguo calendar||525 before ROC
|Thai solar calendar||1929–1930|
|Wikimedia Commons has media related to 1387.|
- January – Sigismund, the future Holy Roman Emperor and husband of Mary, Queen of Hungary, orders the murder of his mother-in-law, Elizabeta Kotromanic, and declares himself joint ruler of Hungary.
- January 1 – Charles III ascends to the throne of Navarre after the death of his father, Charles II.
- January 5 – John I succeeds his father, Peter IV, as King of Aragon and Valencia, and forms an alliance with France and Castile.
- March 11 – Battle of Castagnaro between the Italian cities of Verona and Padua: Padua, led by John Hawkwood, is victorious over Giovanni Ordelaffi of Verona.
- June 2 – John Holland, a maternal half-brother of Richard II of England, is created Earl of Huntingdon.
- August 22 – Olaf, King of Norway and Denmark and claimant to the throne of Sweden, dies. The vacant thrones come under the regency of his mother Margaret I of Denmark, who will soon become Queen in her own right.
- December 19 – Battle of Radcot Bridge: Forces loyal to Richard II of England are defeated by a group of rebellious barons known as the Lords Appellant. Richard II is imprisoned until he agrees to replace all the councillors in his court.
- Timur conquers the Muzaffarid Empire in central Persia and appoints three puppet rulers.
- Khan Tokhtamysh of the Golden Horde invades the Timurid Empire but has to soon after withdraw due to heavy snow.
- Magha II succeeds his brother, Musa II, as Mansa of the Mali Empire.
- July 6 – Queen Blanche I of Navarre (d. 1441)
- date unknown – Henriette, Countess of Montbéliard, regent of Württemberg (d. 1444)
- January – Elizabeth of Bosnia, regent of Hungary
- January 1 – King Charles II of Navarre (b. 1332)
- January 5 – Peter IV of Aragon (b. 1319)
- July 20 – Robert IV of Artois, Count of Eu (poisoned) (b. 1356)
- July 22 – Frans Ackerman, Flemish statesman (b. 1330)
- August 23 – King Olaf IV of Norway/Olaf II of Denmark (b. 1370)
- date unknown