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Millennium: 1st millennium
399 in various calendars
Gregorian calendar 399
Ab urbe condita 1152
Assyrian calendar 5149
Balinese saka calendar 320–321
Bengali calendar −194
Berber calendar 1349
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 320–321
 - Kali Yuga 3499–3500
Holocene calendar 10399
Iranian calendar 223 BP – 222 BP
Islamic calendar 230 BH – 229 BH
Javanese calendar 282–283
Julian calendar 399
Korean calendar 2732
Minguo calendar 1513 before ROC
Nanakshahi calendar −1069
Seleucid era 710/711 AG
Thai solar calendar 941–942
Tibetan calendar 阳土狗年
(male Earth-Dog)
525 or 144 or −628
    — to —
(female Earth-Pig)
526 or 145 or −627
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.