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|252 by topic|
|Ab urbe condita||1005|
|Balinese saka calendar||173–174|
|Chinese calendar||辛未年 (Metal Goat)|
2948 or 2888
— to —
壬申年 (Water Monkey)
2949 or 2889
|Coptic calendar||−32 – −31|
|- Vikram Samvat||308–309|
|- Shaka Samvat||173–174|
|- Kali Yuga||3352–3353|
|Iranian calendar||370 BP – 369 BP|
|Islamic calendar||381 BH – 380 BH|
|Minguo calendar||1660 before ROC|
|Seleucid era||563/564 AG|
|Thai solar calendar||794–795|
378 or −3 or −775
— to —
379 or −2 or −774
Year 252 (CCLII) was a leap 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 Trebonianus and Volusianus (or, less frequently, year 1005 Ab urbe condita). The denomination 252 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.
- Battle of Barbalissos: King Shapur I defeats a Roman field army at Barbalissos in Syria (probable date, could have been in 253). The size of the Roman field army is claimed by Persian sources to have been 70,000 men strong, yet this is unlikely.
- Shapur I, king of Persia, puts the revolt in Khorasan (Iran and Turkmenistan) down and rejoins with his army.
- He invades Armenia and appoints Artavazd VI as the new Armenian king.
- Georgia submits peacefully to Shapur I, and is made a special province in the Persian Empire.
- May 21 – Sun Quan, Chinese warlord and founder of the Eastern Wu state in the Three Kingdoms period (b. 182)
- Empress Pan, Chinese empress of the Eastern Wu state
- Tian Yu, Chinese general of the Cao Wei state (b. 171)