| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 691 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 691 DCXCI |
| Ab urbe condita | 1444 |
| Armenian calendar | 140 ԹՎ ՃԽ |
| Assyrian calendar | 5441 |
| Balinese saka calendar | 612–613 |
| Bengali calendar | 98 |
| Berber calendar | 1641 |
| Buddhist calendar | 1235 |
| Burmese calendar | 53 |
| Byzantine calendar | 6199–6200 |
| Chinese calendar | 庚寅年 (Metal Tiger) 3388 or 3181 — to — 辛卯年 (Metal Rabbit) 3389 or 3182 |
| Coptic calendar | 407–408 |
| Discordian calendar | 1857 |
| Ethiopian calendar | 683–684 |
| Hebrew calendar | 4451–4452 |
| Hindu calendars | |
| - Vikram Samvat | 747–748 |
| - Shaka Samvat | 612–613 |
| - Kali Yuga | 3791–3792 |
| Holocene calendar | 10691 |
| Iranian calendar | 69–70 |
| Islamic calendar | 71–72 |
| Japanese calendar | Shuchō 6 (朱鳥６年) |
| Javanese calendar | 583–584 |
| Julian calendar | 691 DCXCI |
| Korean calendar | 3024 |
| Minguo calendar | 1221 before ROC 民前1221年 |
| Nanakshahi calendar | −777 |
| Seleucid era | 1002/1003 AG |
| Thai solar calendar | 1233–1234 |
| Tibetan calendar | 阳金虎年 (male Iron-Tiger) 817 or 436 or −336 — to — 阴金兔年 (female Iron-Rabbit) 818 or 437 or −335 |
Year 691 (DCXCI) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. The denomination 691 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.