280
| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 280 CCLXXX |
| Ab urbe condita | 1033 |
| Assyrian calendar | 5030 |
| Bengali calendar | −313 |
| Berber calendar | 1230 |
| Buddhist calendar | 824 |
| Burmese calendar | −358 |
| Byzantine calendar | 5788–5789 |
| Chinese calendar |
己亥年 (Earth Pig) 2976 or 2916 — to — 庚子年 (Metal Rat) 2977 or 2917 |
| Coptic calendar | −4 – −3 |
| Discordian calendar | 1446 |
| Ethiopian calendar | 272–273 |
| Hebrew calendar | 4040–4041 |
| Hindu calendars | |
| - Vikram Samvat | 336–337 |
| - Shaka Samvat | 201–202 |
| - Kali Yuga | 3380–3381 |
| Holocene calendar | 10280 |
| Iranian calendar | 342 BP – 341 BP |
| Islamic calendar | 353 BH – 352 BH |
| Javanese calendar | 159–160 |
| Julian calendar | 280 CCLXXX |
| Korean calendar | 2613 |
| Minguo calendar | 1632 before ROC 民前1632年 |
| Nanakshahi calendar | −1188 |
| Seleucid era | 591/592 AG |
| Thai solar calendar | 822–823 |
Year 280 (CCLXXX) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Messalla and Gratus (or, less frequently, year 1033 Ab urbe condita). The denomination 280 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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