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| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 255 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 255 CCLV |
| Ab urbe condita | 1008 |
| Assyrian calendar | 5005 |
| Balinese saka calendar | 176–177 |
| Bengali calendar | −338 |
| Berber calendar | 1205 |
| Buddhist calendar | 799 |
| Burmese calendar | −383 |
| Byzantine calendar | 5763–5764 |
| Chinese calendar | 甲戌年 (Wood Dog) 2952 or 2745 — to — 乙亥年 (Wood Pig) 2953 or 2746 |
| Coptic calendar | −29 – −28 |
| Discordian calendar | 1421 |
| Ethiopian calendar | 247–248 |
| Hebrew calendar | 4015–4016 |
| Hindu calendars | |
| - Vikram Samvat | 311–312 |
| - Shaka Samvat | 176–177 |
| - Kali Yuga | 3355–3356 |
| Holocene calendar | 10255 |
| Iranian calendar | 367 BP – 366 BP |
| Islamic calendar | 378 BH – 377 BH |
| Javanese calendar | 134–135 |
| Julian calendar | 255 CCLV |
| Korean calendar | 2588 |
| Minguo calendar | 1657 before ROC 民前1657年 |
| Nanakshahi calendar | −1213 |
| Seleucid era | 566/567 AG |
| Thai solar calendar | 797–798 |
| Tibetan calendar | 阳木狗年 (male Wood-Dog) 381 or 0 or −772 — to — 阴木猪年 (female Wood-Pig) 382 or 1 or −771 |
Year 255 (CCLV) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known in Rome as the Year of the Consulship of Valerianus and Gallienus (or, less frequently, year 1008 Ab urbe condita). The denomination 255 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.