660
| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 660 DCLX |
| Ab urbe condita | 1413 |
| Armenian calendar | 109 ԹՎ ՃԹ |
| Assyrian calendar | 5410 |
| Bengali calendar | 67 |
| Berber calendar | 1610 |
| Buddhist calendar | 1204 |
| Burmese calendar | 22 |
| Byzantine calendar | 6168–6169 |
| Chinese calendar |
己未年 (Earth Goat) 3356 or 3296 — to — 庚申年 (Metal Monkey) 3357 or 3297 |
| Coptic calendar | 376–377 |
| Discordian calendar | 1826 |
| Ethiopian calendar | 652–653 |
| Hebrew calendar | 4420–4421 |
| Hindu calendars | |
| - Vikram Samvat | 716–717 |
| - Shaka Samvat | 581–582 |
| - Kali Yuga | 3760–3761 |
| Holocene calendar | 10660 |
| Iranian calendar | 38–39 |
| Islamic calendar | 39–40 |
| Japanese calendar | N/A |
| Javanese calendar | 551–552 |
| Julian calendar | 660 DCLX |
| Korean calendar | 2993 |
| Minguo calendar | 1252 before ROC 民前1252年 |
| Nanakshahi calendar | −808 |
| Seleucid era | 971/972 AG |
| Thai solar calendar | 1202–1203 |
Year 660 (DCLX) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar. The denomination 660 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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