620 BC
| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 620 BC DCXIX BC |
| Ab urbe condita | 134 |
| Ancient Egypt era | XXVI dynasty, 45 |
| - Pharaoh | Psamtik I, 45 |
| Ancient Greek era | 40th Olympiad (victor)¹ |
| Assyrian calendar | 4131 |
| Bengali calendar | −1212 |
| Berber calendar | 331 |
| Buddhist calendar | −75 |
| Burmese calendar | −1257 |
| Byzantine calendar | 4889–4890 |
| Chinese calendar |
庚子年 (Metal Rat) 2077 or 2017 — to — 辛丑年 (Metal Ox) 2078 or 2018 |
| Coptic calendar | −903 – −902 |
| Discordian calendar | 547 |
| Ethiopian calendar | −627 – −626 |
| Hebrew calendar | 3141–3142 |
| Hindu calendars | |
| - Vikram Samvat | −563 – −562 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2481–2482 |
| Holocene calendar | 9381 |
| Iranian calendar | 1241 BP – 1240 BP |
| Islamic calendar | 1279 BH – 1278 BH |
| Javanese calendar | N/A |
| Julian calendar | N/A |
| Korean calendar | 1714 |
| Minguo calendar | 2531 before ROC 民前2531年 |
| Nanakshahi calendar | −2087 |
| Thai solar calendar | −77 – −76 |
...
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