This article needs additional citations for verification. (June 2017) (Learn how and when to remove this template message)
|Ab urbe condita||2126|
|Balinese saka calendar||1294–1295|
|English Regnal year||46 Edw. 3 – 47 Edw. 3|
|Chinese calendar||壬子年 (Water Rat)|
4069 or 4009
— to —
癸丑年 (Water Ox)
4070 or 4010
|- Vikram Samvat||1429–1430|
|- Shaka Samvat||1294–1295|
|- Kali Yuga||4473–4474|
|Japanese calendar||Ōan 6|
|Minguo calendar||539 before ROC|
|Thai solar calendar||1915–1916|
1499 or 1118 or 346
— to —
1500 or 1119 or 347
|Wikimedia Commons has media related to 1373.|
- March 24 – The Treaty of Santarém is signed between Ferdinand I of Portugal and Henry II of Castile, ending the second war between the two countries.
- May 13 – Julian of Norwich receives the sixteen Revelations of Divine Love.
- June 16 – The Anglo-Portuguese alliance is signed (currently the oldest active treaty in the world).
- Louis I of Hungary takes Severin again, but the Vlachs will recover it in 1376–1377.
- Bristol in England is made an independent county.
- The city of Phnom Penh (now the capital city of Cambodia) is founded.
- Philip II, Prince of Taranto hands over the rule of Achaea (now southern Greece) to his cousin, Joanna I of Naples.
- Leo V succeeds his distant cousin, Constantine IV, as King of Armenian Cilicia (now southern Turkey).
- A city wall is built around Lisbon, Portugal to resist invasion by Castile.
- Tran Kinh succeeds Tran Phu as King of Vietnam.
- Byzantine co-emperor Andronikos IV Palaiologos rebels against his father, John V Palaiologos, for agreeing to let Constantinople become a vassal of the Ottoman Empire. After the rebellion fails, Ottoman Emperor Murad I commands John V Palaiologos to blind his son.
- The death of Sultan Muhammad as-Said begins a period of political instability in Morocco.
- Merton College Library is built in Oxford, England.
- The Adina Mosque is built in Bengal.
- The Chinese emperor of the Ming Dynasty, the Hongwu Emperor, suspends the traditional civil service examination system, after complaining that the 120 new jinshi degree-holders are too incompetent to hold office; he instead relies solely upon a system of recommendations, until the civil service exams are reinstated in 1384.
- January 16 – Humphrey de Bohun, 7th Earl of Hereford (b. 1342)
- February – Ibn Kathir, Mamluk Islamic scholar (b. 1301)
- July 23 – Saint Birgitta, Swedish saint (b. 1303)
- November 3 – Jeanne de Valois, Queen of Navarre (b. 1343)
- December 7 – Rafał of Tarnów, Polish nobleman (b. c. 1330)
- date unknown
- The New Guinness Book of Records 1996, published October 1995 by Guinness Publishing, page 183