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|Ab urbe condita||2150|
|Balinese saka calendar||1318–1319|
|English Regnal year||20 Ric. 2 – 21 Ric. 2|
|Chinese calendar||丙子年 (Fire Rat)|
4093 or 4033
— to —
丁丑年 (Fire Ox)
4094 or 4034
|- Vikram Samvat||1453–1454|
|- Shaka Samvat||1318–1319|
|- Kali Yuga||4497–4498|
|Japanese calendar||Ōei 4|
|Minguo calendar||515 before ROC|
|Thai solar calendar||1939–1940|
1523 or 1142 or 370
— to —
1524 or 1143 or 371
|Wikimedia Commons has media related to 1397.|
- January – Mircea I takes back the throne of Wallachia.
- February 10 – John Beaufort becomes Earl of Somerset in England.
- June 6 – Richard Whittington is nominated as Lord Mayor of London for the first time.
- July 12 – Richard II of England attempts to reassert authority over his kingdom by arresting members of a group of powerful barons known as the Lords Appellant.
- July 17 – Eric of Pomerania is crowned in Kalmar (Sweden) as ruler of the Kalmar Union, a personal union of the three kingdoms of Denmark, Norway (with Iceland, Greenland, the Faroe Islands, Shetland and Orkney) and Sweden (including Finland and the Åland Islands) engineered by Queen Margaret I of Denmark, his great-aunt and adoptive mother, who retains de facto power in the realm.
- September 25 – Treaty of Kalmar signed.
- September 29
- November 8 – Thomas Arundel, accused of high treason by King Richard II of England, is replaced by Roger Walden as Archbishop of Canterbury.
- The Ottomans capture's the town of Vidin, the capital of the Tsardom of Vidin, the only remaining independent Bulgarian state. Emperor Ivan Sratsimir of Vidin is taken prisoner by early this year and later disappears while his son Constantine II becomes Emperor in his place.
- Temür Qutlugh is crowned as the Khan of Golden Horde with the help of general Edigu, although Edigu continues to hold the real power.
- The Università, a form of local government, is established in Malta.
- The Kirillo-Belozersky Monastery is founded in north-west Russia.
- The Sretensky Monastery is founded in Moscow.
- The first hospital in al-Andalus is created, at Granada.
- Neuhausergasse 4, the brewer of Spaten, is listed on the register of Munich breweries.
- Gregory of Tatev writes the Book of Questions, a ten-volume encyclopedic work, at the Tatev Monastery, in Armenia.
- February 21 – Infanta Isabel, Duchess of Burgundy (d. 1471)
- May 15 – Sejong the Great of Joseon, ruler of Korea (d. 1450)
- August 10 – Albert II of Germany, Holy Roman Emperor (d. 1439)
- November 15 – Pope Nicholas V (d. 1455)
- date unknown
- January 11 – Skirgaila, Grand Duke of Lithuania
- February 18 – Enguerrand VII, Lord of Coucy (b. 1340)
- March 14 – Henry VIII the Sparrow, Duke of Żagań–Głogów (b.c. 1357)
- April 25 – Thomas Holland, 2nd Earl of Kent (b. 1350)
- June 3 – William Montacute, 2nd Earl of Salisbury, English military leader (b. 1328)
- June 16 – Philip of Artois, Count of Eu, French soldier (b. 1358)
- July 15 – Catherine of Henneberg, German ruler (b. c. 1334)
- September 2 – Francesco Landini, Italian composer
- September 8 – Thomas of Woodstock, 1st Duke of Gloucester, son of King Edward III of England (b. 1355)
- September 15 – Adam Easton, English cardinal
- September 21 – Richard FitzAlan, 11th Earl of Arundel, English military leader (executed) (b. 1346)
- October 6 – Vuk Branković, Serbian lord (b. 1345)
- "Islamic Culture and the Medical Arts – Hospitals". U.S. National Library of Medicine. Retrieved June 17, 2018.
- "Nicholas V | Vatican Library & Dum Diversas". Encyclopedia Britannica. Retrieved May 6, 2019.
- "Chimalpopoca, "Escudo humeante (1417-1426)" [Chimalpopoca, “Smoking Shield" (1417-1426)]. Arqueologia Mexico (in Spanish).