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|Ab urbe condita||2076|
|Balinese saka calendar||1244–1245|
|English Regnal year||16 Edw. 2 – 17 Edw. 2|
|Chinese calendar||壬戌年 (Water Dog)|
4019 or 3959
— to —
癸亥年 (Water Pig)
4020 or 3960
|- Vikram Samvat||1379–1380|
|- Shaka Samvat||1244–1245|
|- Kali Yuga||4423–4424|
|Japanese calendar||Genkō 3|
|Minguo calendar||589 before ROC|
|Thai solar calendar||1865–1866|
1449 or 1068 or 296
— to —
1450 or 1069 or 297
- March 6 – Treaty of Paris: Louis I, Count of Flanders relinquishes his claim to Zeeland.
- July 18 – Thomas Aquinas is canonised.
- August 12 – The Treaty of Nöteborg between Sweden and the Novgorod Republic is signed, regulating the border for the first time.
- The first Great Black Death epidemic spreads through southern parts of Asia, killing 50 million people by 1353.
- Lithuania: In the Letters of Gediminas, Vilnius is named as the capital city.
- Remains of the Lighthouse of Alexandria (one of the Seven Wonders of the Ancient World) are toppled by the third of a series of earthquakes.
- A conflict between Ingeborg of Norway, and the regencies of her son in Sweden and Norway, ends with the diminution of her power.
- March 3 – Andrew Harclay, 1st Earl of Carlisle, English military leader
- August – Isabella of Burgundy, Queen of Germany (b. 1270)
- September 4 – Gegeen Khan, Emperor Yingzong of Yuan (b. 1303)
- October 16 – Amadeus V, Count of Savoy (b. 1249)
- date unknown