| 203 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 203 BC |
| Ab urbe condita | 551 |
| Armenian calendar | N/A |
| Assyrian calendar | 4548 |
| Bahá'í calendar | -2046–-2045 |
| Bengali calendar | -795 |
| Berber calendar | 748 |
| English Regnal year | N/A |
| Buddhist calendar | 342 |
| Burmese calendar | -840 |
| Byzantine calendar | 5306–5307 |
| Chinese calendar | 丁酉年 (2434/2494) — to —
戊戌年(2435/2495) |
| Coptic calendar | -486–-485 |
| Ethiopian calendar | -210–-209 |
| Hebrew calendar | 3558–3559 |
| Hindu calendars | |
| - Vikram Samvat | -146–-145 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2899–2900 |
| Holocene calendar | 9798 |
| Iranian calendar | 824 BP – 823 BP |
| Islamic calendar | 849 BH – 848 BH |
| Japanese calendar | |
| Julian calendar | |
| Korean calendar | 2131 |
| Minguo calendar | 2114 before ROC 民前2114年 |
| Thai solar calendar | 341 |
| Wikimedia Commons has media related to: 203 BC |
Year 203 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Caepio and Geminus (or, less frequently, year 551 Ab urbe condita). The denomination 203 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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