657
| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 657 DCLVII |
| Ab urbe condita | 1410 |
| Armenian calendar | 106 ԹՎ ՃԶ |
| Assyrian calendar | 5407 |
| Bengali calendar | 64 |
| Berber calendar | 1607 |
| Buddhist calendar | 1201 |
| Burmese calendar | 19 |
| Byzantine calendar | 6165–6166 |
| Chinese calendar |
丙辰年 (Fire Dragon) 3353 or 3293 — to — 丁巳年 (Fire Snake) 3354 or 3294 |
| Coptic calendar | 373–374 |
| Discordian calendar | 1823 |
| Ethiopian calendar | 649–650 |
| Hebrew calendar | 4417–4418 |
| Hindu calendars | |
| - Vikram Samvat | 713–714 |
| - Shaka Samvat | 578–579 |
| - Kali Yuga | 3757–3758 |
| Holocene calendar | 10657 |
| Iranian calendar | 35–36 |
| Islamic calendar | 36–37 |
| Japanese calendar | N/A |
| Javanese calendar | 548–549 |
| Julian calendar | 657 DCLVII |
| Korean calendar | 2990 |
| Minguo calendar | 1255 before ROC 民前1255年 |
| Nanakshahi calendar | −811 |
| Seleucid era | 968/969 AG |
| Thai solar calendar | 1199–1200 |
Year 657 (DCLVII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. The denomination 657 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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