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| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1266 by topic |
|---|
| Leaders |
| Birth and death categories |
| Births – Deaths |
| Establishments and disestablishments categories |
| Establishments – Disestablishments |
| Art and literature |
| 1266 in poetry |
| Gregorian calendar | 1266 MCCLXVI |
| Ab urbe condita | 2019 |
| Armenian calendar | 715 ԹՎ ՉԺԵ |
| Assyrian calendar | 6016 |
| Balinese saka calendar | 1187–1188 |
| Bengali calendar | 673 |
| Berber calendar | 2216 |
| English Regnal year | 50 Hen. 3 – 51 Hen. 3 |
| Buddhist calendar | 1810 |
| Burmese calendar | 628 |
| Byzantine calendar | 6774–6775 |
| Chinese calendar | 乙丑年 (Wood Ox) 3963 or 3756 — to — 丙寅年 (Fire Tiger) 3964 or 3757 |
| Coptic calendar | 982–983 |
| Discordian calendar | 2432 |
| Ethiopian calendar | 1258–1259 |
| Hebrew calendar | 5026–5027 |
| Hindu calendars | |
| - Vikram Samvat | 1322–1323 |
| - Shaka Samvat | 1187–1188 |
| - Kali Yuga | 4366–4367 |
| Holocene calendar | 11266 |
| Igbo calendar | 266–267 |
| Iranian calendar | 644–645 |
| Islamic calendar | 664–665 |
| Japanese calendar | Bun'ei 3 (文永３年) |
| Javanese calendar | 1176–1177 |
| Julian calendar | 1266 MCCLXVI |
| Korean calendar | 3599 |
| Minguo calendar | 646 before ROC 民前646年 |
| Nanakshahi calendar | −202 |
| Thai solar calendar | 1808–1809 |
| Tibetan calendar | 阴木牛年 (female Wood-Ox) 1392 or 1011 or 239 — to — 阳火虎年 (male Fire-Tiger) 1393 or 1012 or 240 |
Year 1266 (MCCLXVI) was a common year starting on Friday (link will display the full calendar) of the Julian calendar.