Back 1400 Abkhazian 1400 Afrikaans 1400 ALS 1400 እ.ኤ.አ. Amharic 1400 AN 1400 Arabic 1400 ARY 1400 ARZ 1400 AST 1400 AVK
| 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 |
| Gregorian calendar | 1400 MCD |
| Ab urbe condita | 2153 |
| Armenian calendar | 849 ԹՎ ՊԽԹ |
| Assyrian calendar | 6150 |
| Balinese saka calendar | 1321–1322 |
| Bengali calendar | 807 |
| Berber calendar | 2350 |
| English Regnal year | 1 Hen. 4 – 2 Hen. 4 |
| Buddhist calendar | 1944 |
| Burmese calendar | 762 |
| Byzantine calendar | 6908–6909 |
| Chinese calendar | 己卯年 (Earth Rabbit) 4096 or 4036 — to — 庚辰年 (Metal Dragon) 4097 or 4037 |
| Coptic calendar | 1116–1117 |
| Discordian calendar | 2566 |
| Ethiopian calendar | 1392–1393 |
| Hebrew calendar | 5160–5161 |
| Hindu calendars | |
| - Vikram Samvat | 1456–1457 |
| - Shaka Samvat | 1321–1322 |
| - Kali Yuga | 4500–4501 |
| Holocene calendar | 11400 |
| Igbo calendar | 400–401 |
| Iranian calendar | 778–779 |
| Islamic calendar | 802–803 |
| Japanese calendar | Ōei 7 (応永７年) |
| Javanese calendar | 1314–1315 |
| Julian calendar | 1400 MCD |
| Korean calendar | 3733 |
| Minguo calendar | 512 before ROC 民前512年 |
| Nanakshahi calendar | −68 |
| Thai solar calendar | 1942–1943 |
| Tibetan calendar | 阴土兔年 (female Earth-Rabbit) 1526 or 1145 or 373 — to — 阳金龙年 (male Iron-Dragon) 1527 or 1146 or 374 |
1400 (MCD) was a leap year starting on Thursday of the Julian calendar, the 1400th year of the Common Era (CE) and Anno Domini (AD) designations, the 400th year of the 2nd millennium, the 100th and last year of the 14th century, and the 1st year of the 1400s decade. As of the start of 1400, the Gregorian calendar was 8 days ahead of the Julian calendar, which was the dominant calendar of the time.