401

401 (CDI) was a common year starting on Tuesday of the Julian calendar, the 401st year of the Common Era (CE) and Anno Domini (AD) designations, the 401st year of the 1st millennium, the 1st year of the 5th century, and the 2nd year of the 400s decade. As of the start of 401, the Gregorian calendar was 1 day ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium:	1st millennium
Centuries:	4th century – 5th century – 6th century
Decades:	370s  380s  390s  – 400s –  410s  420s  430s
Years:	398 399 400 – 401 – 402 403 404

401 in other calendars

Gregorian calendar	401 CDI
Ab urbe condita	1154
Assyrian calendar	5151
Balinese saka calendar	322–323
Bengali calendar	−192
Berber calendar	1351
Buddhist calendar	945
Burmese calendar	−237
Byzantine calendar	5909–5910
Chinese calendar	庚子年 (Metal Rat) 3097 or 3037     — to — 辛丑年 (Metal Ox) 3098 or 3038
Coptic calendar	117–118
Discordian calendar	1567
Ethiopian calendar	393–394
Hebrew calendar	4161–4162
Hindu calendars
- Vikram Samvat	457–458
- Shaka Samvat	322–323
- Kali Yuga	3501–3502
Holocene calendar	10401
Iranian calendar	221 BP – 220 BP
Islamic calendar	228 BH – 227 BH
Javanese calendar	284–285
Julian calendar	401 CDI
Korean calendar	2734
Minguo calendar	1511 before ROC 民前1511年
Nanakshahi calendar	−1067
Seleucid era	712/713 AG
Thai solar calendar	943–944
Tibetan calendar	阳金鼠年 (male Iron-Rat) 527 or 146 or −626     — to — 阴金牛年 (female Iron-Ox) 528 or 147 or −625

Events

• Pope Innocent I succeeds Pope Anastasius I.
• The Vandals start their westward trek from Dacia and Hungary (or 400).
• The Visigoths begin to attack the northernmost reaches of Italy, causing destruction in the countryside.
• Kumarajiva arrives in Changan.
• Western Roman Empire general Stilicho leads an extensive campaign against the Vandals in Rhaetia.
• Synod of Turin

Deaths

for more information, see Category:401 deaths.