| Millennium: | 1st millennium |
|---|---|
| Centuries: | 2nd century – 3rd century – 4th century |
| Decades: | 230s 240s 250s – 260s – 270s 280s 290s |
| Years: | 261 262 263 – 264 – 265 266 267 |
| 264 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 264 CCLXIV |
| Ab urbe condita | 1017 |
| Armenian calendar | N/A |
| Assyrian calendar | 5014 |
| Bahá'í calendar | -1580–-1579 |
| Bengali calendar | -329 |
| Berber calendar | 1214 |
| English Regnal year | N/A |
| Buddhist calendar | 808 |
| Burmese calendar | -374 |
| Byzantine calendar | 5772–5773 |
| Chinese calendar | 癸未年十一月十五日 (2900/2960-11-15) — to —
甲申年十一月廿六日(2901/2961-11-26) |
| Coptic calendar | -20–-19 |
| Ethiopian calendar | 256–257 |
| Hebrew calendar | 4024–4025 |
| Hindu calendars | |
| - Vikram Samvat | 320–321 |
| - Shaka Samvat | 186–187 |
| - Kali Yuga | 3365–3366 |
| Holocene calendar | 10264 |
| Iranian calendar | 358 BP – 357 BP |
| Islamic calendar | 369 BH – 368 BH |
| Japanese calendar | |
| Korean calendar | 2597 |
| Minguo calendar | 1648 before ROC 民前1648年 |
| Thai solar calendar | 807 |
Year 264 (CCLXIV) was a leap year starting on Friday (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 Saturninus (or, less frequently, year 1017 Ab urbe condita). The denomination 264 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.