668
| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 668 DCLXVIII |
| Ab urbe condita | 1421 |
| Armenian calendar | 117 ԹՎ ՃԺԷ |
| Assyrian calendar | 5418 |
| Bengali calendar | 75 |
| Berber calendar | 1618 |
| Buddhist calendar | 1212 |
| Burmese calendar | 30 |
| Byzantine calendar | 6176–6177 |
| Chinese calendar |
丁卯年 (Fire Rabbit) 3364 or 3304 — to — 戊辰年 (Earth Dragon) 3365 or 3305 |
| Coptic calendar | 384–385 |
| Discordian calendar | 1834 |
| Ethiopian calendar | 660–661 |
| Hebrew calendar | 4428–4429 |
| Hindu calendars | |
| - Vikram Samvat | 724–725 |
| - Shaka Samvat | 589–590 |
| - Kali Yuga | 3768–3769 |
| Holocene calendar | 10668 |
| Iranian calendar | 46–47 |
| Islamic calendar | 47–48 |
| Japanese calendar | N/A |
| Javanese calendar | 559–560 |
| Julian calendar | 668 DCLXVIII |
| Korean calendar | 3001 |
| Minguo calendar | 1244 before ROC 民前1244年 |
| Nanakshahi calendar | −800 |
| Seleucid era | 979/980 AG |
| Thai solar calendar | 1210–1211 |
Year 668 (DCLXVIII) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar. The denomination 668 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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