688
| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 688 DCLXXXVIII |
| Ab urbe condita | 1441 |
| Armenian calendar | 137 ԹՎ ՃԼԷ |
| Assyrian calendar | 5438 |
| Bengali calendar | 95 |
| Berber calendar | 1638 |
| Buddhist calendar | 1232 |
| Burmese calendar | 50 |
| Byzantine calendar | 6196–6197 |
| Chinese calendar |
丁亥年 (Fire Pig) 3384 or 3324 — to — 戊子年 (Earth Rat) 3385 or 3325 |
| Coptic calendar | 404–405 |
| Discordian calendar | 1854 |
| Ethiopian calendar | 680–681 |
| Hebrew calendar | 4448–4449 |
| Hindu calendars | |
| - Vikram Samvat | 744–745 |
| - Shaka Samvat | 609–610 |
| - Kali Yuga | 3788–3789 |
| Holocene calendar | 10688 |
| Iranian calendar | 66–67 |
| Islamic calendar | 68–69 |
| Japanese calendar | N/A |
| Javanese calendar | 580–581 |
| Julian calendar | 688 DCLXXXVIII |
| Korean calendar | 3021 |
| Minguo calendar | 1224 before ROC 民前1224年 |
| Nanakshahi calendar | −780 |
| Seleucid era | 999/1000 AG |
| Thai solar calendar | 1230–1231 |
Year 688 (DCLXXXVIII) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar. The denomination 688 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.
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