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|249 by topic|
|Ab urbe condita||1002|
|Balinese saka calendar||170–171|
|Chinese calendar||戊辰年 (Earth Dragon)|
2945 or 2885
— to —
己巳年 (Earth Snake)
2946 or 2886
|Coptic calendar||−35 – −34|
|- Vikram Samvat||305–306|
|- Shaka Samvat||170–171|
|- Kali Yuga||3349–3350|
|Iranian calendar||373 BP – 372 BP|
|Islamic calendar||384 BH – 383 BH|
|Minguo calendar||1663 before ROC|
|Seleucid era||560/561 AG|
|Thai solar calendar||791–792|
375 or −6 or −778
— to —
376 or −5 or −777
Year 249 (CCXLIX) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Gavius and Aquilinus (or, less frequently, year 1002 Ab urbe condita). The denomination 249 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.
- Trajan Decius puts down a revolt in Moesia and Pannonia. Loyal legionaries proclaim him emperor and he leads them into Italy. At the Battle of Verona, he defeats and kills Philip the Arab.
- Decius begins persecuting the Christians and others refusing to participate in Emperor worship.
- February 5 – Incident at Gaoping Tombs: In the Chinese state of Cao Wei, the regent Sima Yi, in a coup d'état, forces his co-regent Cao Shuang to relinquish his power after taking control of the capital city of Luoyang and issuing a memorial which listed out the various crimes he and his associates had committed.
- In Alexandria, the populace pillages the homes of Christians.
- Shi Chong, Chinese statesmen
- February 9 – Cao Shuang, Chinese general and regent of the Cao Wei state
- Philip the Arab, Roman emperor (b. 204)
- Quan Cong, Chinese general of the Eastern Wu state (b. 198)
- Wang Bi, Chinese philosopher (b. 226)
- Zhu Ran, Chinese general of the Eastern Wu state (b. 182)