| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1399 by topic | |
| Leaders | |
| Political entities - State leaders - Religious leaders | |
| Birth and death categories | |
| Births - Deaths | |
| Establishments and disestablishments categories | |
| Establishments - Disestablishments | |
| Art and literature | |
| 1399 in poetry | |
| Gregorian calendar | 1399 MCCCXCIX |
| Ab urbe condita | 2152 |
| Armenian calendar | 848 ԹՎ ՊԽԸ |
| Assyrian calendar | 6149 |
| Bengali calendar | 806 |
| Berber calendar | 2349 |
| English Regnal year | 22 Ric. 2 – 1 Hen. 4 |
| Buddhist calendar | 1943 |
| Burmese calendar | 761 |
| Byzantine calendar | 6907–6908 |
| Chinese calendar |
戊寅年 (Earth Tiger) 4095 or 4035 — to — 己卯年 (Earth Rabbit) 4096 or 4036 |
| Coptic calendar | 1115–1116 |
| Discordian calendar | 2565 |
| Ethiopian calendar | 1391–1392 |
| Hebrew calendar | 5159–5160 |
| Hindu calendars | |
| - Vikram Samvat | 1455–1456 |
| - Shaka Samvat | 1320–1321 |
| - Kali Yuga | 4499–4500 |
| Holocene calendar | 11399 |
| Igbo calendar | 399–400 |
| Iranian calendar | 777–778 |
| Islamic calendar | 801–802 |
| Japanese calendar |
Ōei 6 (応永6年) |
| Javanese calendar | 1313–1314 |
| Julian calendar | 1399 MCCCXCIX |
| Korean calendar | 3732 |
| Minguo calendar | 513 before ROC 民前513年 |
| Nanakshahi calendar | −69 |
| Thai solar calendar | 1941–1942 |
Year 1399 (MCCCXCIX) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar.