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|365 by topic|
|Ab urbe condita||1118|
|Balinese saka calendar||286–287|
|Chinese calendar||甲子年 (Wood Rat)|
3061 or 3001
— to —
乙丑年 (Wood Ox)
3062 or 3002
|- Vikram Samvat||421–422|
|- Shaka Samvat||286–287|
|- Kali Yuga||3465–3466|
|Iranian calendar||257 BP – 256 BP|
|Islamic calendar||265 BH – 264 BH|
|Minguo calendar||1547 before ROC|
|Seleucid era||676/677 AG|
|Thai solar calendar||907–908|
491 or 110 or −662
— to —
492 or 111 or −661
Year 365 (CCCLXV) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known in the West as the Year of the Consulship of Augustus and Valens (or, less frequently, year 1118 Ab urbe condita). The denomination 365 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.
- July 21 – An earthquake and tsunami devastates Crete and Alexandria and affects Italy, Greece, and Palestine.
- September 28 – Procopius revolts and bribes two legions passing by Constantinople. He proclaims himself Emperor, and takes control of Thrace and Bithynia.
- November 1 – The Alamanni cross the Rhine and invade Gaul. Emperor Valentinian I moves to Paris to command the army and defend the Gallic cities.
- March 30 – Sixteen Kingdoms: Jin Feidi, age 23, succeeds his brother Jin Aidi as emperor of the Eastern Jin Dynasty. He has no actual power; governmental matters are largely in the hands of his granduncle Sima Yu.
- Basil of Caesarea becomes presbyter of Caesarea.
- Emperor Valens orders the expulsion of the Alexandrian bishop Athanasius from his see, but instead of going into exile Athanasius, now about 67, moves to the outskirts of Alexandria.
- Antipope Felix II dies after a 9-year reign, ending the double occupancy of the papacy.
- Julius Agricola, Roman consul and praetorian prefect
- Kou Qianzhi, Chinese high official and Daoist (d. 448)
- Tao Qian, Chinese poet of the Eastern Jin Dynasty (d. 427)
- Tufa Rutan, prince of the Xianbei state Southern Liang (d. 415)
- March 30 – Jin Aidi, emperor of the Eastern Jin Dynasty (b. 341)
- June 10 – Saint Asterius of Petra
- November 22 – Felix, antipope
- Charietto, German headhunter
- Hillel II, Jewish religious leader
- Wang Muzhi, empress and wife of Jin Aidi