|383 by topic|
|Ab urbe condita||1136|
|Balinese saka calendar||304–305|
|Chinese calendar||壬午年 (Water Horse)|
3079 or 3019
— to —
癸未年 (Water Goat)
3080 or 3020
|- Vikram Samvat||439–440|
|- Shaka Samvat||304–305|
|- Kali Yuga||3483–3484|
|Iranian calendar||239 BP – 238 BP|
|Islamic calendar||246 BH – 245 BH|
|Minguo calendar||1529 before ROC|
|Seleucid era||694/695 AG|
|Thai solar calendar||925–926|
509 or 128 or −644
— to —
510 or 129 or −643
Year 383 (CCCLXXXIII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Merobaudes and Saturninus (or, less frequently, year 1136 Ab urbe condita). The denomination 383 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
- Niall of the Nine Hostages becomes the first High King of Ireland
- Hadrian's Wall, the northern Roman frontier in Britain, is overrun by the Picts and falls into ruin.
- January 19 – Arcadius is elevated to Emperor.
- Roman troops in Britain proclaim Magnus Maximus Emperor. He crosses over to the continent and makes Trier his capital. Gaul, the Italian provinces and Hispania proclaim loyalty to him.
- August 25 – Emperor Gratian, age 24, is assassinated at Lugdunum (modern Lyon), leaving a young widow Laeta. Pannonia and Africa maintain their allegiance to co-emperor Valentinian II, now 12, whose mother, Justina, rules in his name.
- Emperor Theodosius I cedes Dacia and Macedonia to Valentinian II. They recognize Magnus Maximus as Augustus.
- Theodosius I sends Flavius Stilicho as an envoy to the Persian court of King Shapur III at Ctesiphon, to negotiate a peace settlement relating to the partition of Armenia.
- Battle of Feishui: The Jin Dynasty defeats the Former Qin dynasty in Anhui.
- King Ardashir II dies after a 4-year reign. He is succeeded by his son Shapur III.
- Council of Constantinople (383), is held as a local council of mainly eastern bishops. The Council discusses various doctrinal issues, examining several issues regarding Arianism, and rejects the teachings of Eunomius of Cyzicus.
- By the order of Emperor Theodosius I, Eunomius of Cyzicus is banished to Moesia.
- May 30 – Isaac of Dalmatia, Byzantine Orthodox priest and saint
- August 25 – Gratian, Roman Emperor (assassinated) (b. 359)
- October 21 – Saint Ursula
- Ardashir II, king of Persia
- Flavia Maxima Constantia, daughter of Constantius II
- Frumentius, the "Apostle to Ethiopia"
- Fu Rong, general of the Chinese Di state Former Qin
- Wulfila, Arian Gothic bishop
- Illustrated Dictionary of Irish History. Mac Annaidh, S (ed). Gill and Macmillan, Dublin. 2001
- David L. Vagi (2001). Coinage and History of the Roman Empire. Chicago, Ill: Fitzroy Dearborn Publishers. p. 590. ISBN 1-57958-316-4.
- Harbus, A. (2002). Helena of Britain in medieval legend. Woodbridge, Suffolk, UK: D.S. Brewer. p. 55. ISBN 0-85991-625-1.
- Peterson, Barbara (2000). Notable women of China: Shang dynasty to the early twentieth century. Armonk, N.Y: M.E. Sharpe. p. 148. ISBN 0-7656-0504-X.
- Percy Molesworth Sykes (2003). A History of Persia. London: Routledge/Curzon. p. 427. ISBN 0-415-32678-8.
- Rose, Hugh James (1853). A New General Biographical Dictionary. p. 90.
- Saheed A. Adejumobi (2007). The history of Ethiopia. Westport, Conn: Greenwood Press. p. 171. ISBN 0-313-32273-2.
- Rieger, Joerg; Kwok Pui-lan; Compier, Don H. (2007). Empire and the Christian Tradition: New Readings of Classical Theologians. Minneapolis: Fortress Press. p. 96. ISBN 0-8006-6215-6.