1256
| Years | 
|---|
| Millennium | 
| 2nd millennium | 
| Centuries | 
| Decades | 
| Years | 
| 1256 by topic | 
|---|
| Leaders | 
| 
 | 
| Birth and death categories | 
| Births – Deaths | 
| Establishments and disestablishments categories | 
| Establishments – Disestablishments | 
| Art and literature | 
| 1256 in poetry | 
| Gregorian calendar | 1256 MCCLVI | 
| Ab urbe condita | 2009 | 
| Armenian calendar | 705 ԹՎ ՉԵ | 
| Assyrian calendar | 6006 | 
| Balinese saka calendar | 1177–1178 | 
| Bengali calendar | 662–663 | 
| Berber calendar | 2206 | 
| English Regnal year | 40 Hen. 3 – 41 Hen. 3 | 
| Buddhist calendar | 1800 | 
| Burmese calendar | 618 | 
| Byzantine calendar | 6764–6765 | 
| Chinese calendar | 乙卯年 (Wood Rabbit) 3953 or 3746 — to — 丙辰年 (Fire Dragon) 3954 or 3747 | 
| Coptic calendar | 972–973 | 
| Discordian calendar | 2422 | 
| Ethiopian calendar | 1248–1249 | 
| Hebrew calendar | 5016–5017 | 
| Hindu calendars | |
| - Vikram Samvat | 1312–1313 | 
| - Shaka Samvat | 1177–1178 | 
| - Kali Yuga | 4356–4357 | 
| Holocene calendar | 11256 | 
| Igbo calendar | 256–257 | 
| Iranian calendar | 634–635 | 
| Islamic calendar | 653–654 | 
| Japanese calendar | Kenchō 8 / Kōgen 1 (康元元年) | 
| Javanese calendar | 1165–1166 | 
| Julian calendar | 1256 MCCLVI | 
| Korean calendar | 3589 | 
| Minguo calendar | 656 before ROC 民前656年 | 
| Nanakshahi calendar | −212 | 
| Thai solar calendar | 1798–1799 | 
| Tibetan calendar | 阴木兔年 (female Wood-Rabbit) 1382 or 1001 or 229 — to — 阳火龙年 (male Fire-Dragon) 1383 or 1002 or 230 | 
Year 1256 (MCCLVI) was a leap year starting on Saturday of the Julian calendar.