| Centuries: | 3rd century · 4th century · 5th century |
| Decades: | 280s 290s 300s 310s 320s 330s 340s |
| Years: | 308 309 310 311 312 313 314 |
| 311 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 311 CCCXI |
| Ab urbe condita | 1064 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1533 – -1532 |
| Bengali calendar | -282 |
| Berber calendar | 1261 |
| Buddhist calendar | 855 |
| Burmese calendar | -327 |
| Byzantine calendar | 5819 – 5820 |
| Chinese calendar | 庚午年十一月廿五日 (2947/3007-11-25) — to —
辛未年十二月初五日(2948/3008-12-5) |
| Coptic calendar | 27 – 28 |
| Ethiopian calendar | 303 – 304 |
| Hebrew calendar | 4071 – 4072 |
| Hindu calendars | |
| - Bikram Samwat | 367 – 368 |
| - Shaka Samvat | 233 – 234 |
| - Kali Yuga | 3412 – 3413 |
| Holocene calendar | 10311 |
| Iranian calendar | 311 BP – 310 BP |
| Islamic calendar | 321 BH – 320 BH |
| Japanese calendar | |
| Korean calendar | 2644 |
| Thai solar calendar | 854 |