400
| Millennium: | 1st millennium |
|---|---|
| Centuries: | 3rd century – 4th century – 5th century |
| Decades: | 370s 380s 390s – 400s – 410s 420s 430s |
| Years: | 397 398 399 – 400 – 401 402 403 |
| Gregorian calendar | 400 CD |
| Ab urbe condita | 1153 |
| Assyrian calendar | 5150 |
| Balinese saka calendar | 321–322 |
| Bengali calendar | −193 |
| Berber calendar | 1350 |
| Buddhist calendar | 944 |
| Burmese calendar | −238 |
| Byzantine calendar | 5908–5909 |
| Chinese calendar | 己亥年 (Earth Pig) 3096 or 3036 — to — 庚子年 (Metal Rat) 3097 or 3037 |
| Coptic calendar | 116–117 |
| Discordian calendar | 1566 |
| Ethiopian calendar | 392–393 |
| Hebrew calendar | 4160–4161 |
| Hindu calendars | |
| - Vikram Samvat | 456–457 |
| - Shaka Samvat | 321–322 |
| - Kali Yuga | 3500–3501 |
| Holocene calendar | 10400 |
| Iranian calendar | 222 BP – 221 BP |
| Islamic calendar | 229 BH – 228 BH |
| Javanese calendar | 283–284 |
| Julian calendar | 400 CD |
| Korean calendar | 2733 |
| Minguo calendar | 1512 before ROC 民前1512年 |
| Nanakshahi calendar | −1068 |
| Seleucid era | 711/712 AG |
| Thai solar calendar | 942–943 |
| Tibetan calendar | 阴土猪年 (female Earth-Pig) 526 or 145 or −627 — to — 阳金鼠年 (male Iron-Rat) 527 or 146 or −626 |
400 (CD) was a leap year starting on Sunday of the Julian calendar, the 400th year of the Common Era (CE) and Anno Domini (AD) designations, the 400th year of the 1st millennium, the 100th and last year of the 4th century, and the 1st year of the 400s decade. As of the start of 400, the Gregorian calendar was 1 day ahead of the Julian calendar, which was the dominant calendar of the time.
Events
[change | change source]- First invasion of Italy by Alaric (probable date).
- The Vandals start their westward trek from Dacia and Hungary (approximate date).
- Construction (and therefore occupation) at Great Zimbabwe begins (approximate date).
- Earliest date of human occupation on Easter Island (approximate date).
- Chrysanthemums are introduced to Japan (approximate date).