From Simple English Wikipedia, the free encyclopedia
Millennium: 1st millennium
Centuries: 3rd century4th century5th century
Decades: 370s  380s  390s  – 400s –  410s  420s  430s
Years: 397 398 399400401 402 403
400 in other calendars
Gregorian calendar400
Ab urbe condita1153
Assyrian calendar5150
Balinese saka calendar321–322
Bengali calendar−193
Berber calendar1350
Buddhist calendar944
Burmese calendar−238
Byzantine calendar5908–5909
Chinese calendar己亥(Earth Pig)
3096 or 3036
    — to —
庚子年 (Metal Rat)
3097 or 3037
Coptic calendar116–117
Discordian calendar1566
Ethiopian calendar392–393
Hebrew calendar4160–4161
Hindu calendars
 - Vikram Samvat456–457
 - Shaka Samvat321–322
 - Kali Yuga3500–3501
Holocene calendar10400
Iranian calendar222 BP – 221 BP
Islamic calendar229 BH – 228 BH
Javanese calendar283–284
Julian calendar400
Korean calendar2733
Minguo calendar1512 before ROC
Nanakshahi calendar−1068
Seleucid era711/712 AG
Thai solar calendar942–943
Tibetan calendar阴土猪年
(female Earth-Pig)
526 or 145 or −627
    — to —
(male Iron-Rat)
527 or 146 or −626

Year 400 (CD) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Stilicho and Aurelianus (or, less frequently, year 1153 Ab urbe condita). The denomination 400 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.

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