| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1366 by topic | |
| Leaders | |
| Political entities - State leaders - Religious leaders | |
| Birth and death categories | |
| Births - Deaths | |
| Establishments and disestablishments categories | |
| Establishments - Disestablishments | |
| Art and literature | |
| 1366 in poetry | |
| Gregorian calendar | 1366 MCCCLXVI |
| Ab urbe condita | 2119 |
| Armenian calendar | 815 ԹՎ ՊԺԵ |
| Assyrian calendar | 6116 |
| Bengali calendar | 773 |
| Berber calendar | 2316 |
| English Regnal year | 39 Edw. 3 – 40 Edw. 3 |
| Buddhist calendar | 1910 |
| Burmese calendar | 728 |
| Byzantine calendar | 6874–6875 |
| Chinese calendar |
乙巳年 (Wood Snake) 4062 or 4002 — to — 丙午年 (Fire Horse) 4063 or 4003 |
| Coptic calendar | 1082–1083 |
| Discordian calendar | 2532 |
| Ethiopian calendar | 1358–1359 |
| Hebrew calendar | 5126–5127 |
| Hindu calendars | |
| - Vikram Samvat | 1422–1423 |
| - Shaka Samvat | 1287–1288 |
| - Kali Yuga | 4466–4467 |
| Holocene calendar | 11366 |
| Igbo calendar | 366–367 |
| Iranian calendar | 744–745 |
| Islamic calendar | 767–768 |
| Japanese calendar |
Jōji 5 (貞治5年) |
| Javanese calendar | 1279–1280 |
| Julian calendar | 1366 MCCCLXVI |
| Korean calendar | 3699 |
| Minguo calendar | 546 before ROC 民前546年 |
| Nanakshahi calendar | −102 |
| Thai solar calendar | 1908–1909 |
Year 1366 (MCCCLXVI) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.