| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 266 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 266 CCLXVI |
| Ab urbe condita | 1019 |
| Assyrian calendar | 5016 |
| Balinese saka calendar | 187–188 |
| Bengali calendar | −327 |
| Berber calendar | 1216 |
| Buddhist calendar | 810 |
| Burmese calendar | −372 |
| Byzantine calendar | 5774–5775 |
| Chinese calendar | 乙酉年 (Wood Rooster) 2963 or 2756 — to — 丙戌年 (Fire Dog) 2964 or 2757 |
| Coptic calendar | −18 – −17 |
| Discordian calendar | 1432 |
| Ethiopian calendar | 258–259 |
| Hebrew calendar | 4026–4027 |
| Hindu calendars | |
| - Vikram Samvat | 322–323 |
| - Shaka Samvat | 187–188 |
| - Kali Yuga | 3366–3367 |
| Holocene calendar | 10266 |
| Iranian calendar | 356 BP – 355 BP |
| Islamic calendar | 367 BH – 366 BH |
| Javanese calendar | 145–146 |
| Julian calendar | 266 CCLXVI |
| Korean calendar | 2599 |
| Minguo calendar | 1646 before ROC 民前1646年 |
| Nanakshahi calendar | −1202 |
| Seleucid era | 577/578 AG |
| Thai solar calendar | 808–809 |
| Tibetan calendar | 阴木鸡年 (female Wood-Rooster) 392 or 11 or −761 — to — 阳火狗年 (male Fire-Dog) 393 or 12 or −760 |
Year 266 (CCLXVI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Gallienus and Sabinillus (or, less frequently, year 1019 Ab urbe condita). The denomination 266 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.