| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 30 BC by topic |
| Politics |
|---|
| Categories |
| Gregorian calendar | 30 BC XXX BC |
| Ab urbe condita | 724 |
| Ancient Egypt era | XXXIII dynasty, 294 |
| - Pharaoh | Cleopatra VII, 22 |
| Ancient Greek era | 187th Olympiad, year 3 |
| Assyrian calendar | 4721 |
| Balinese saka calendar | N/A |
| Bengali calendar | −622 |
| Berber calendar | 921 |
| Buddhist calendar | 515 |
| Burmese calendar | −667 |
| Byzantine calendar | 5479–5480 |
| Chinese calendar | 庚寅年 (Metal Tiger) 2668 or 2461 — to — 辛卯年 (Metal Rabbit) 2669 or 2462 |
| Coptic calendar | −313 – −312 |
| Discordian calendar | 1137 |
| Ethiopian calendar | −37 – −36 |
| Hebrew calendar | 3731–3732 |
| Hindu calendars | |
| - Vikram Samvat | 27–28 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 3071–3072 |
| Holocene calendar | 9971 |
| Iranian calendar | 651 BP – 650 BP |
| Islamic calendar | 671 BH – 670 BH |
| Javanese calendar | N/A |
| Julian calendar | 30 BC XXX BC |
| Korean calendar | 2304 |
| Minguo calendar | 1941 before ROC 民前1941年 |
| Nanakshahi calendar | −1497 |
| Seleucid era | 282/283 AG |
| Thai solar calendar | 513–514 |
| Tibetan calendar | 阳金虎年 (male Iron-Tiger) 97 or −284 or −1056 — to — 阴金兔年 (female Iron-Rabbit) 98 or −283 or −1055 |
Year 30 BC was either a common year starting on Wednesday, Thursday or Friday or a leap year starting on Thursday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for further information) and a common year starting on Wednesday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Octavian and Crassus (or, less frequently, year 724 Ab urbe condita). The denomination 30 BC 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.