| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 84 BC by topic |
| Politics |
|---|
| Categories |
| Gregorian calendar | 84 BC LXXXIV BC |
| Ab urbe condita | 670 |
| Ancient Egypt era | XXXIII dynasty, 240 |
| - Pharaoh | Ptolemy IX Lathyros, 5 |
| Ancient Greek era | 174th Olympiad (victor)¹ |
| Assyrian calendar | 4667 |
| Balinese saka calendar | N/A |
| Bengali calendar | −676 |
| Berber calendar | 867 |
| Buddhist calendar | 461 |
| Burmese calendar | −721 |
| Byzantine calendar | 5425–5426 |
| Chinese calendar | 丙申年 (Fire Monkey) 2614 or 2407 — to — 丁酉年 (Fire Rooster) 2615 or 2408 |
| Coptic calendar | −367 – −366 |
| Discordian calendar | 1083 |
| Ethiopian calendar | −91 – −90 |
| Hebrew calendar | 3677–3678 |
| Hindu calendars | |
| - Vikram Samvat | −27 – −26 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 3017–3018 |
| Holocene calendar | 9917 |
| Iranian calendar | 705 BP – 704 BP |
| Islamic calendar | 727 BH – 726 BH |
| Javanese calendar | N/A |
| Julian calendar | N/A |
| Korean calendar | 2250 |
| Minguo calendar | 1995 before ROC 民前1995年 |
| Nanakshahi calendar | −1551 |
| Seleucid era | 228/229 AG |
| Thai solar calendar | 459–460 |
| Tibetan calendar | 阳火猴年 (male Fire-Monkey) 43 or −338 or −1110 — to — 阴火鸡年 (female Fire-Rooster) 44 or −337 or −1109 |
Year 84 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Carbo and Cinna (or, less frequently, year 670 Ab urbe condita). The denomination 84 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.