| Millennium: | 2nd millennium |
|---|---|
| Centuries: | 13th century – 14th century – 15th century |
| Decades: | 1370s 1380s 1390s – 1400s – 1410s 1420s 1430s |
| Years: | 1397 1398 1399 – 1400 – 1401 1402 1403 |
| 1400 in topic: |
| Subjects: Archaeology – Architecture – |
| Art – Literature – Music – Science |
| Leaders: State leaders – Colonial governors |
| Category: Establishments – Disestablishments |
| Births – Deaths – Works |
Year 1400 (MCD) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar.
| Gregorian calendar | 1400 MCD |
| Ab urbe condita | 2153 |
| Armenian calendar | 849 ԹՎ ՊԽԹ |
| Bahá'í calendar | -444 – -443 |
| Bengali calendar | 807 |
| Berber calendar | 2350 |
| Buddhist calendar | 1944 |
| Burmese calendar | 762 |
| Byzantine calendar | 6908 – 6909 |
| Chinese calendar | 己卯年十二月初五日 (4036/4096-12-5) — to —
庚辰年十二月十六日(4037/4097-12-16) |
| Coptic calendar | 1116 – 1117 |
| Ethiopian calendar | 1392 – 1393 |
| Hebrew calendar | 5160 – 5161 |
| Hindu calendars | |
| - Bikram Samwat | 1456 – 1457 |
| - Shaka Samvat | 1322 – 1323 |
| - Kali Yuga | 4501 – 4502 |
| Holocene calendar | 11400 |
| Iranian calendar | 778 – 779 |
| Islamic calendar | 802 – 803 |
| Japanese calendar | Ōei 7 (応永7年) |
| Korean calendar | 3733 |
| Thai solar calendar | 1943 |