| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1255 by topic |
|---|
| Leaders |
| Birth and death categories |
| Births – Deaths |
| Establishments and disestablishments categories |
| Establishments – Disestablishments |
| Art and literature |
| 1255 in poetry |
| Gregorian calendar | 1255 MCCLV |
| Ab urbe condita | 2008 |
| Armenian calendar | 704 ԹՎ ՉԴ |
| Assyrian calendar | 6005 |
| Balinese saka calendar | 1176–1177 |
| Bengali calendar | 662 |
| Berber calendar | 2205 |
| English Regnal year | 39 Hen. 3 – 40 Hen. 3 |
| Buddhist calendar | 1799 |
| Burmese calendar | 617 |
| Byzantine calendar | 6763–6764 |
| Chinese calendar | 甲寅年 (Wood Tiger) 3952 or 3745 — to — 乙卯年 (Wood Rabbit) 3953 or 3746 |
| Coptic calendar | 971–972 |
| Discordian calendar | 2421 |
| Ethiopian calendar | 1247–1248 |
| Hebrew calendar | 5015–5016 |
| Hindu calendars | |
| - Vikram Samvat | 1311–1312 |
| - Shaka Samvat | 1176–1177 |
| - Kali Yuga | 4355–4356 |
| Holocene calendar | 11255 |
| Igbo calendar | 255–256 |
| Iranian calendar | 633–634 |
| Islamic calendar | 652–653 |
| Japanese calendar | Kenchō 7 (建長７年) |
| Javanese calendar | 1164–1165 |
| Julian calendar | 1255 MCCLV |
| Korean calendar | 3588 |
| Minguo calendar | 657 before ROC 民前657年 |
| Nanakshahi calendar | −213 |
| Thai solar calendar | 1797–1798 |
| Tibetan calendar | 阳木虎年 (male Wood-Tiger) 1381 or 1000 or 228 — to — 阴木兔年 (female Wood-Rabbit) 1382 or 1001 or 229 |
Year 1255 (MCCLV) was a common year starting on Friday (link will display the full calendar) of the Julian calendar.