642 BC
| Years |
|---|
| Millennium |
| 1st millennium BC |
| Centuries |
| Decades |
| Years |
| 642 BC by topic |
| Politics |
|---|
| Categories |
| Gregorian calendar | 642 BC DCXLII BC |
| Ab urbe condita | 112 |
| Ancient Egypt era | XXVI dynasty, 23 |
| - Pharaoh | Psamtik I, 23 |
| Ancient Greek Olympiad (summer) | 34th Olympiad, year 3 |
| Assyrian calendar | 4109 |
| Balinese saka calendar | N/A |
| Bengali calendar | −1235 – −1234 |
| Berber calendar | 309 |
| Buddhist calendar | −97 |
| Burmese calendar | −1279 |
| Byzantine calendar | 4867–4868 |
| Chinese calendar | 戊寅年 (Earth Tiger) 2056 or 1849 — to — 己卯年 (Earth Rabbit) 2057 or 1850 |
| Coptic calendar | −925 – −924 |
| Discordian calendar | 525 |
| Ethiopian calendar | −649 – −648 |
| Hebrew calendar | 3119–3120 |
| Hindu calendars | |
| - Vikram Samvat | −585 – −584 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2459–2460 |
| Holocene calendar | 9359 |
| Iranian calendar | 1263 BP – 1262 BP |
| Islamic calendar | 1302 BH – 1301 BH |
| Javanese calendar | N/A |
| Julian calendar | N/A |
| Korean calendar | 1692 |
| Minguo calendar | 2553 before ROC 民前2553年 |
| Nanakshahi calendar | −2109 |
| Thai solar calendar | −99 – −98 |
| Tibetan calendar | 阳土虎年 (male Earth-Tiger) −515 or −896 or −1668 — to — 阴土兔年 (female Earth-Rabbit) −514 or −895 or −1667 |
The year 642 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 112 Ab urbe condita . The denomination 642 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.