| Millennium: | 1st millennium |
|---|---|
| Centuries: | 3rd century – 4th century – 5th century |
| Decades: | 270s 280s 290s – 300s – 310s 320s 330s |
| Years: | 302 303 304 – 305 – 306 307 308 |
| 305 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 305 CCCV |
| Ab urbe condita | 1058 |
| Armenian calendar | N/A |
| Assyrian calendar | 5055 |
| Bahá'í calendar | -1539–-1538 |
| Bengali calendar | -288 |
| Berber calendar | 1255 |
| English Regnal year | N/A |
| Buddhist calendar | 849 |
| Burmese calendar | -333 |
| Byzantine calendar | 5813–5814 |
| Chinese calendar | 甲子年十一月十九日 (2941/3001-11-19) — to —
乙丑年十一月廿九日(2942/3002-11-29) |
| Coptic calendar | 21–22 |
| Ethiopian calendar | 297–298 |
| Hebrew calendar | 4065–4066 |
| Hindu calendars | |
| - Vikram Samvat | 361–362 |
| - Shaka Samvat | 227–228 |
| - Kali Yuga | 3406–3407 |
| Holocene calendar | 10305 |
| Iranian calendar | 317 BP – 316 BP |
| Islamic calendar | 327 BH – 326 BH |
| Japanese calendar | |
| Korean calendar | 2638 |
| Minguo calendar | 1607 before ROC 民前1607年 |
| Thai solar calendar | 848 |
Year 305 (CCCV) 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 Constantius and Valerius (or, less frequently, year 1058 Ab urbe condita). The denomination 305 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.