| Millennium: | 1st Millennium BC |
|---|---|
| Centuries: | 5th cent. BC – 4th cent. BC – 3rd cent. BC |
| Decades: | 330s BC 320s BC 310s BC – 300s BC – 290s BC 280s BC 270s BC |
| Years: | 308 BC 307 BC 306 BC – 305 BC – 304 BC 303 BC 302 BC |
| Gregorian calendar | 305 CCCV |
| Ab urbe condita | 1058 |
| Assyrian calendar | 5055 |
| Bengali calendar | −288 |
| Berber calendar | 1255 |
| Buddhist calendar | 849 |
| Burmese calendar | −333 |
| Byzantine calendar | 5813–5814 |
| Chinese calendar | 甲子年 (Wood Rat) 3001 or 2941 — to — 乙丑年 (Wood Ox) 3002 or 2942 |
| Coptic calendar | 21–22 |
| Discordian calendar | 1471 |
| Ethiopian calendar | 297–298 |
| Hebrew calendar | 4065–4066 |
| Hindu calendars | |
| - Vikram Samvat | 361–362 |
| - Shaka Samvat | 226–227 |
| - Kali Yuga | 3405–3406 |
| Holocene calendar | 10305 |
| Iranian calendar | 317 BP – 316 BP |
| Islamic calendar | 327 BH – 326 BH |
| Javanese calendar | 185–186 |
| Julian calendar | 305 CCCV |
| Korean calendar | 2638 |
| Minguo calendar | 1607 before ROC 民前1607年 |
| Nanakshahi calendar | −1163 |
| Seleucid era | 616/617 AG |
| Thai solar calendar | 847–848 |
The year 305 BC