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|335 by topic|
|Ab urbe condita||1088|
|Balinese saka calendar||256–257|
|Chinese calendar||甲午年 (Wood Horse)|
3031 or 2971
— to —
乙未年 (Wood Goat)
3032 or 2972
|- Vikram Samvat||391–392|
|- Shaka Samvat||256–257|
|- Kali Yuga||3435–3436|
|Iranian calendar||287 BP – 286 BP|
|Islamic calendar||296 BH – 295 BH|
|Minguo calendar||1577 before ROC|
|Seleucid era||646/647 AG|
|Thai solar calendar||877–878|
461 or 80 or −692
— to —
462 or 81 or −691
Year 335 (CCCXXXV) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantius and Albinus (or, less frequently, year 1088 Ab urbe condita). The denomination 335 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.
- September 14 – Emperor Constantine I consecrates the Church of the Holy Sepulchre in Jerusalem.
- September 19 – Flavius Dalmatius is raised to the rank of Caesar, with control of Thracia and Macedonia.
- Hannibalianus, nephew of Constantine I, is made Rex Regum ("King of Kings of the Pontic people").
- November 7 – Athanasius is banished to Trier, on charge that he prevented the corn fleet from sailing to Constantinople.
- Samudragupta succeeds Chandragupta I as king of the Gupta Empire.
- Tuoba Hena ousts Tuoba Yihuai as chieftain of the Tuoba Clan.
- Emperor Shi Hu moves the capital of the Later Zhao state to Yecheng.
- First Synod of Tyre: Constantine I convenes a gathering of bishops at Tyre to depose and exile Patriarch Athanasius of Alexandria.
- Constantine I reinstates the Alexandrian priest Arius (declared a heretic at the First Council of Nicaea in 325) in a synod at Jerusalem about a year before Arius' death.
- September 13 – The Church of the Holy Sepulchre in Jerusalem is consecrated.
- December 31 – Pope Sylvester I dies at Rome after a 21-year reign. He is succeeded by Mark as the 34th pope.
- Fu Sheng, emperor of the Chinese Di state Former Qin (d. 357)
- Gregory of Nyssa, Christian bishop and saint (approximate date)
- Magnus Maximus, Western Roman Emperor (approximate date)
- Theon of Alexandria, last director of the Library of Alexandria (approximate date)
- Chandragupta I, king of the Gupta Empire
- Lady Xun, concubine of Emperor Yuan of Jin and mother of Emperor Ming of Jin
- December 31 – Pope Sylvester I