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This article is about the year 399. For the number, see 399 (number).
Millennium: 1st millennium
Centuries: 3rd century4th century5th century
Decades: 360s  370s  380s  – 390s –  400s  410s  420s
Years: 396 397 398399400 401 402
399 by topic
State leadersSovereign states
Birth and death categories
Establishment and disestablishment categories
399 in other calendars
Gregorian calendar 399
Ab urbe condita 1152
Armenian calendar N/A
Assyrian calendar 5149
Bahá'í calendar −1445 – −1444
Bengali calendar −194
Berber calendar 1349
English Regnal year N/A
Buddhist calendar 943
Burmese calendar −239
Byzantine calendar 5907–5908
Chinese calendar 戊戌(Earth Dog)
3095 or 3035
    — to —
己亥年 (Earth Pig)
3096 or 3036
Coptic calendar 115–116
Discordian calendar 1565
Ethiopian calendar 391–392
Hebrew calendar 4159–4160
Hindu calendars
 - Vikram Samvat 455–456
 - Shaka Samvat 321–322
 - Kali Yuga 3500–3501
Holocene calendar 10399
Igbo calendar −601 – −600
Iranian calendar 223 BP – 222 BP
Islamic calendar 230 BH – 229 BH
Japanese calendar N/A
Juche calendar N/A
Julian calendar 399
Korean calendar 2732
Minguo calendar 1513 before ROC
Thai solar calendar 942
King Yazdegerd I (399–421)

Year 399 (CCCXCIX) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Eutropius and Theodorus (or, less frequently, year 1152 Ab urbe condita). The denomination 399 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.


By place[edit]

Roman Empire[edit]


By topic[edit]


  • November 26Pope Siricius dies at Rome after a 15-year reign in which he has commanded celibacy for priests, asserted papal authority over the entire Western Church, and threatened to impose sanctions who do not follow his dictates.
  • Anastasius I succeeds Siricius as the 39th pope. He seeks to reconcile the churches of Rome and Antioch. Anastasius also condemns the doctrine of Origen.
  • Flavian I is acknowledged as legitimate bishop of Antioch by the Church of Rome.