| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | 4th century BC – 3rd century BC – 2nd century BC |
| Decades: | 300s BC 290s BC 280s BC – 270s BC – 260s BC 250s BC 240s BC |
| Years: | 281 BC 280 BC 279 BC – 278 BC – 277 BC 276 BC 275 BC |
| 278 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 278 BC |
| Ab urbe condita | 476 |
| Armenian calendar | N/A |
| Assyrian calendar | 4473 |
| Bahá'í calendar | -2121–-2120 |
| Bengali calendar | -870 |
| Berber calendar | 673 |
| English Regnal year | N/A |
| Buddhist calendar | 267 |
| Burmese calendar | -915 |
| Byzantine calendar | 5231–5232 |
| Chinese calendar | 壬午年 (2359/2419) — to —
癸未年(2360/2420) |
| Coptic calendar | -561–-560 |
| Ethiopian calendar | -285–-284 |
| Hebrew calendar | 3483–3484 |
| Hindu calendars | |
| - Bikram Samwat | -221–-220 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2824–2825 |
| Holocene calendar | 9723 |
| Iranian calendar | 899 BP – 898 BP |
| Islamic calendar | 927 BH – 926 BH |
| Japanese calendar | |
| Korean calendar | 2056 |
| Minguo calendar | 2189 before ROC 民前2189年 |
| Thai solar calendar | 266 |
| Wikimedia Commons has media related to: 278 BC |
Year 278 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Luscinus and Papus (or, less frequently, year 476 Ab urbe condita). The denomination 278 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.
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