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|358 by topic|
|Ab urbe condita||1111|
|Balinese saka calendar||279–280|
|Chinese calendar||丁巳年 (Fire Snake)|
3054 or 2994
— to —
戊午年 (Earth Horse)
3055 or 2995
|- Vikram Samvat||414–415|
|- Shaka Samvat||279–280|
|- Kali Yuga||3458–3459|
|Iranian calendar||264 BP – 263 BP|
|Islamic calendar||272 BH – 271 BH|
|Minguo calendar||1554 before ROC|
|Seleucid era||669/670 AG|
|Thai solar calendar||900–901|
484 or 103 or −669
— to —
485 or 104 or −668
Year 358 (CCCLVIII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Datianus and Cerealis (or, less frequently, year 1111 Ab urbe condita). The denomination 358 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.
- Emperor Constantius II builds new forts to secure upper Mesopotamia. Persia's king Shapur II sends an emissary to Constantinople with gifts and a letter wrapped in white silk. He addresses Constantius to return the lands of his ancestors from the Euphrates to the frontier of Macedonia. Constantius tactfully refuses to cede any territories.
- The Salian Franks capitulate to Julian the Apostate in Gaul. He allows them to form a Roman foederati in Toxandria. Frankish settlers are established in areas in the north and the east to help with the defense of the Rhine frontier.
- An invasion of Pannonia by the Quadi and the Sarmates is repulsed by Constantius II.
- August 24 — An earthquake destroys Nicomedia, and damages 150 cities in Macedonia, Asia and Pontus.
- Constantius II recalls Pope Liberius to Rome, where he receives a joyous welcome from the Christians. Antipope Felix II prudently retires to his estate near Porto (Portugal).
- Eudoxius becomes Patriarch of Antioch.
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- Paulinus of Trier, bishop and Christian saint
- Princess Duan, wife of Murong Chui, ruler and founder of Later Yan
- Noel Emmanuel Lenski (2002). Failure of Empire: Valens and the Roman State in the Fourth Century A.D. University of California Press. pp. 386–. ISBN 978-0-520-23332-4.