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|393 by topic|
|Ab urbe condita||1146|
|Balinese saka calendar||314–315|
|Chinese calendar||壬辰年 (Water Dragon)
3089 or 3029
— to —
癸巳年 (Water Snake)
3090 or 3030
|- Vikram Samvat||449–450|
|- Shaka Samvat||314–315|
|- Kali Yuga||3493–3494|
|Iranian calendar||229 BP – 228 BP|
|Islamic calendar||236 BH – 235 BH|
|Minguo calendar||1519 before ROC
|Seleucid era||704/705 AG|
|Thai solar calendar||935–936|
519 or 138 or −634
— to —
520 or 139 or −633
|Wikimedia Commons has media related to 393.|
Year 393 (CCCXCIII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Augustus (or, less frequently, year 1146 Ab urbe condita). The denomination 393 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.
- January 23 – Emperor Theodosius I proclaims his son Honorius, age 8, co-ruler (Augustus) of the Western Roman Empire.
- Theodosius I demands the destruction of pagan temples, holy sites, and ancient objects throughout the Roman Empire.
- Theodosius I abolishes the Greek Olympic Games, ending a thousand years of festivals, as part of the general Christian policy to establish universal Christian worship in accordance with the doctrines set forth in the Nicene Creed.
- Gao Zu succeeds Tai Zu as emperor of the Later Qin Empire.
- Chinese astronomers observe the guest star SN 393.
- Synod of Hippo: A council at Hippo Regius (Algeria) is hosted by the Church. The bishops approve a canon of Sacred Scripture that correspond to the Roman Catholic Church.
- Sima Maoying, empress of the Liu Song Dynasty (d. 439)
- Theodoret of Cyrrhus, bishop and theologian (approximate date)
- Eunomius of Cyzicus, Arian bishop and theologian
- Zhai Zhao "Heavenly Prince" (Tian Wang), emperor of Wei