638 BC
| Years |
|---|
| Millennium |
| 1st millennium BC |
| Centuries |
| Decades |
| Years |
| 638 BC by topic |
| Politics |
|---|
| Categories |
| Gregorian calendar | 638 BC DCXXXVIII BC |
| Ab urbe condita | 116 |
| Ancient Egypt era | XXVI dynasty, 27 |
| - Pharaoh | Psamtik I, 27 |
| Ancient Greek Olympiad (summer) | 35th Olympiad, year 3 |
| Assyrian calendar | 4113 |
| Balinese saka calendar | N/A |
| Bengali calendar | −1231 – −1230 |
| Berber calendar | 313 |
| Buddhist calendar | −93 |
| Burmese calendar | −1275 |
| Byzantine calendar | 4871–4872 |
| Chinese calendar | 壬午年 (Water Horse) 2060 or 1853 — to — 癸未年 (Water Goat) 2061 or 1854 |
| Coptic calendar | −921 – −920 |
| Discordian calendar | 529 |
| Ethiopian calendar | −645 – −644 |
| Hebrew calendar | 3123–3124 |
| Hindu calendars | |
| - Vikram Samvat | −581 – −580 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2463–2464 |
| Holocene calendar | 9363 |
| Iranian calendar | 1259 BP – 1258 BP |
| Islamic calendar | 1298 BH – 1297 BH |
| Javanese calendar | N/A |
| Julian calendar | N/A |
| Korean calendar | 1696 |
| Minguo calendar | 2549 before ROC 民前2549年 |
| Nanakshahi calendar | −2105 |
| Thai solar calendar | −95 – −94 |
| Tibetan calendar | 阳水马年 (male Water-Horse) −511 or −892 or −1664 — to — 阴水羊年 (female Water-Goat) −510 or −891 or −1663 |
The year 638 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 116 Ab urbe condita . The denomination 638 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.