| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1257 by topic |
|---|
| Leaders |
| Birth and death categories |
| Births – Deaths |
| Establishments and disestablishments categories |
| Establishments – Disestablishments |
| Art and literature |
| 1257 in poetry |
| Gregorian calendar | 1257 MCCLVII |
| Ab urbe condita | 2010 |
| Armenian calendar | 706 ԹՎ ՉԶ |
| Assyrian calendar | 6007 |
| Balinese saka calendar | 1178–1179 |
| Bengali calendar | 664 |
| Berber calendar | 2207 |
| English Regnal year | 41 Hen. 3 – 42 Hen. 3 |
| Buddhist calendar | 1801 |
| Burmese calendar | 619 |
| Byzantine calendar | 6765–6766 |
| Chinese calendar | 丙辰年 (Fire Dragon) 3954 or 3747 — to — 丁巳年 (Fire Snake) 3955 or 3748 |
| Coptic calendar | 973–974 |
| Discordian calendar | 2423 |
| Ethiopian calendar | 1249–1250 |
| Hebrew calendar | 5017–5018 |
| Hindu calendars | |
| - Vikram Samvat | 1313–1314 |
| - Shaka Samvat | 1178–1179 |
| - Kali Yuga | 4357–4358 |
| Holocene calendar | 11257 |
| Igbo calendar | 257–258 |
| Iranian calendar | 635–636 |
| Islamic calendar | 654–655 |
| Japanese calendar | Kōgen 2 / Shōka (era) 1 (正嘉元年) |
| Javanese calendar | 1166–1167 |
| Julian calendar | 1257 MCCLVII |
| Korean calendar | 3590 |
| Minguo calendar | 655 before ROC 民前655年 |
| Nanakshahi calendar | −211 |
| Thai solar calendar | 1799–1800 |
| Tibetan calendar | 阳火龙年 (male Fire-Dragon) 1383 or 1002 or 230 — to — 阴火蛇年 (female Fire-Snake) 1384 or 1003 or 231 |
Year 1257 (MCCLVII) was a common year starting on Monday (link will display the full calendar) of the Julian calendar.