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| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 657 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 657 DCLVII |
| Ab urbe condita | 1410 |
| Armenian calendar | 106 ԹՎ ՃԶ |
| Assyrian calendar | 5407 |
| Balinese saka calendar | 578–579 |
| Bengali calendar | 64 |
| Berber calendar | 1607 |
| Buddhist calendar | 1201 |
| Burmese calendar | 19 |
| Byzantine calendar | 6165–6166 |
| Chinese calendar | 丙辰年 (Fire Dragon) 3354 or 3147 — to — 丁巳年 (Fire Snake) 3355 or 3148 |
| 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 | Hakuchi 8 (白雉８年) |
| 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 |
| Tibetan calendar | 阳火龙年 (male Fire-Dragon) 783 or 402 or −370 — to — 阴火蛇年 (female Fire-Snake) 784 or 403 or −369 |
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.