|348 by topic|
|Ab urbe condita||1101|
|Balinese saka calendar||269–270|
|Chinese calendar||丁未年 (Fire Goat)|
3044 or 2984
— to —
戊申年 (Earth Monkey)
3045 or 2985
|- Vikram Samvat||404–405|
|- Shaka Samvat||269–270|
|- Kali Yuga||3448–3449|
|Iranian calendar||274 BP – 273 BP|
|Islamic calendar||282 BH – 281 BH|
|Minguo calendar||1564 before ROC|
|Seleucid era||659/660 AG|
|Thai solar calendar||890–891|
474 or 93 or −679
— to —
475 or 94 or −678
Year 348 (CCCXLVIII) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Philippus and Salia (or, less frequently, year 1101 Ab urbe condita). The denomination 348 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.
- Wulfila escapes religious persecution by the Gothic chieftain Athanaric, and obtains permission from Constantius II to migrate with his flock of converts to Moesia and settle near Nicopolis ad Istrum (Bulgaria).
- In Persia, women are enrolled in the army to perform auxiliary services.
- In India, Samudragupta of the Gupta Empire defeats Rudrasena in battle.
- May 9 – Pachomius the Great, founder of Christian cenobitic monasticism (b. 292)
- December 12 – Saint Spyridon, Greek-Cypriot Orthodox bishop and saint (b. 270)