| Centuries: | 3rd century · 4th century · 5th century |
| Decades: | 290s 300s 310s 320s 330s 340s 350s |
| Years: | 320 321 322 323 324 325 326 |
| 323 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 323 CCCXXIII |
| Ab urbe condita | 1076 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1521 – -1520 |
| Bengali calendar | -270 |
| Berber calendar | 1273 |
| Buddhist calendar | 867 |
| Burmese calendar | -315 |
| Byzantine calendar | 5831 – 5832 |
| Chinese calendar | 壬午年閏十一月初八日 (2959/3019-intercalary 11-8) — to —
癸未年十一月十八日(2960/3020-11-18) |
| Coptic calendar | 39 – 40 |
| Ethiopian calendar | 315 – 316 |
| Hebrew calendar | 4083 – 4084 |
| Hindu calendars | |
| - Bikram Samwat | 379 – 380 |
| - Shaka Samvat | 245 – 246 |
| - Kali Yuga | 3424 – 3425 |
| Holocene calendar | 10323 |
| Iranian calendar | 299 BP – 298 BP |
| Islamic calendar | 308 BH – 307 BH |
| Japanese calendar | |
| Korean calendar | 2656 |
| Thai solar calendar | 866 |