| Millennium: | 2nd millennium |
|---|---|
| Centuries: | 14th century – 15th century – 16th century |
| Decades: | 1370s 1380s 1390s – 1400s – 1410s 1420s 1430s |
| Years: | 1398 1399 1400 – 1401 – 1402 1403 1404 |
| Gregorian calendar | 1401 MCDI |
| Ab urbe condita | 2154 |
| Armenian calendar | 850 ԹՎ ՊԾ |
| Assyrian calendar | 6151 |
| Balinese saka calendar | 1322–1323 |
| Bengali calendar | 808 |
| Berber calendar | 2351 |
| English Regnal year | 2 Hen. 4 – 3 Hen. 4 |
| Buddhist calendar | 1945 |
| Burmese calendar | 763 |
| Byzantine calendar | 6909–6910 |
| Chinese calendar | 庚辰年 (Metal Dragon) 4097 or 4037 — to — 辛巳年 (Metal Snake) 4098 or 4038 |
| Coptic calendar | 1117–1118 |
| Discordian calendar | 2567 |
| Ethiopian calendar | 1393–1394 |
| Hebrew calendar | 5161–5162 |
| Hindu calendars | |
| - Vikram Samvat | 1457–1458 |
| - Shaka Samvat | 1322–1323 |
| - Kali Yuga | 4501–4502 |
| Holocene calendar | 11401 |
| Igbo calendar | 401–402 |
| Iranian calendar | 779–780 |
| Islamic calendar | 803–804 |
| Japanese calendar | Ōei 8 (応永８年) |
| Javanese calendar | 1315–1316 |
| Julian calendar | 1401 MCDI |
| Korean calendar | 3734 |
| Minguo calendar | 511 before ROC 民前511年 |
| Nanakshahi calendar | −67 |
| Thai solar calendar | 1943–1944 |
| Tibetan calendar | 阳金龙年 (male Iron-Dragon) 1527 or 1146 or 374 — to — 阴金蛇年 (female Iron-Snake) 1528 or 1147 or 375 |
1401 (MCDI) was a common year starting on Saturday of the Julian calendar, the 1401st year of the Common Era (CE) and Anno Domini (AD) designations, the 401st year of the 2nd millennium, the 1st year of the 15th century, and the 2nd year of the 1400s decade. As of the start of 1401, the Gregorian calendar was 9 days ahead of the Julian calendar, which was the dominant calendar of the time.