| Millennium: | 1st millennium |
|---|---|
| Centuries: | 6th century – 7th century – 8th century |
| Decades: | 650s 660s 670s – 680s – 690s 700s 710s |
| Years: | 683 684 685 – 686 – 687 688 689 |
| 686 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 686 DCLXXXVI |
| Ab urbe condita | 1439 |
| Armenian calendar | 135 ԹՎ ՃԼԵ |
| Assyrian calendar | 5436 |
| Bahá'í calendar | -1158–-1157 |
| Bengali calendar | 93 |
| Berber calendar | 1636 |
| English Regnal year | N/A |
| Buddhist calendar | 1230 |
| Burmese calendar | 48 |
| Byzantine calendar | 6194–6195 |
| Chinese calendar | 乙酉年十二月初二日 (3322/3382-12-2) — to —
丙戌年十二月十一日(3323/3383-12-11) |
| Coptic calendar | 402–403 |
| Ethiopian calendar | 678–679 |
| Hebrew calendar | 4446–4447 |
| Hindu calendars | |
| - Vikram Samvat | 742–743 |
| - Shaka Samvat | 608–609 |
| - Kali Yuga | 3787–3788 |
| Holocene calendar | 10686 |
| Iranian calendar | 64–65 |
| Islamic calendar | 66–67 |
| Japanese calendar | |
| Korean calendar | 3019 |
| Minguo calendar | 1226 before ROC 民前1226年 |
| Thai solar calendar | 1229 |
Year 686 (DCLXXXVI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 686 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.