 | This article needs additional citations for verification. (April 2019) |
| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 401 by topic |
|---|
| Leaders |
| Categories |
| 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) 3098 or 2891 — to — 辛丑年 (Metal Ox) 3099 or 2892 |
| 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 |
Year 401 (CDI) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Vincentius and Fravitus (or, less frequently, year 1154 Ab urbe condita). The denomination 401 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.