| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1091 by topic |
|---|
| Leaders |
| Birth and death categories |
| Births – Deaths |
| Establishments and disestablishments categories |
| Establishments – Disestablishments |
| Gregorian calendar | 1091 MXCI |
| Ab urbe condita | 1844 |
| Armenian calendar | 540 ԹՎ ՇԽ |
| Assyrian calendar | 5841 |
| Balinese saka calendar | 1012–1013 |
| Bengali calendar | 498 |
| Berber calendar | 2041 |
| English Regnal year | 4 Will. 2 – 5 Will. 2 |
| Buddhist calendar | 1635 |
| Burmese calendar | 453 |
| Byzantine calendar | 6599–6600 |
| Chinese calendar | 庚午年 (Metal Horse) 3788 or 3581 — to — 辛未年 (Metal Goat) 3789 or 3582 |
| Coptic calendar | 807–808 |
| Discordian calendar | 2257 |
| Ethiopian calendar | 1083–1084 |
| Hebrew calendar | 4851–4852 |
| Hindu calendars | |
| - Vikram Samvat | 1147–1148 |
| - Shaka Samvat | 1012–1013 |
| - Kali Yuga | 4191–4192 |
| Holocene calendar | 11091 |
| Igbo calendar | 91–92 |
| Iranian calendar | 469–470 |
| Islamic calendar | 483–484 |
| Japanese calendar | Kanji 5 (寛治５年) |
| Javanese calendar | 995–996 |
| Julian calendar | 1091 MXCI |
| Korean calendar | 3424 |
| Minguo calendar | 821 before ROC 民前821年 |
| Nanakshahi calendar | −377 |
| Seleucid era | 1402/1403 AG |
| Thai solar calendar | 1633–1634 |
| Tibetan calendar | 阳金马年 (male Iron-Horse) 1217 or 836 or 64 — to — 阴金羊年 (female Iron-Goat) 1218 or 837 or 65 |
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Year 1091 (MXCI) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar.