| Millennium: | 1st millennium |
|---|---|
| Centuries: | 5th century – 6th century – 7th century |
| Decades: | 470s 480s 490s – 500s – 510s 520s 530s |
| Years: | 500 501 502 – 503 – 504 505 506 |
| 503 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 503 DIII |
| Ab urbe condita | 1256 |
| Armenian calendar | N/A |
| Assyrian calendar | 5253 |
| Bahá'í calendar | -1341–-1340 |
| Bengali calendar | -90 |
| Berber calendar | 1453 |
| English Regnal year | N/A |
| Buddhist calendar | 1047 |
| Burmese calendar | -135 |
| Byzantine calendar | 6011–6012 |
| Chinese calendar | 壬午年十一月十八日 (3139/3199-11-18) — to —
癸未年十一月廿八日(3140/3200-11-28) |
| Coptic calendar | 219–220 |
| Ethiopian calendar | 495–496 |
| Hebrew calendar | 4263–4264 |
| Hindu calendars | |
| - Vikram Samvat | 559–560 |
| - Shaka Samvat | 425–426 |
| - Kali Yuga | 3604–3605 |
| Holocene calendar | 10503 |
| Iranian calendar | 119 BP – 118 BP |
| Islamic calendar | 123 BH – 122 BH |
| Japanese calendar | |
| Korean calendar | 2836 |
| Minguo calendar | 1409 before ROC 民前1409年 |
| Thai solar calendar | 1046 |
Year 503 (DIII) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Volusianus and Dixicrates (or, less frequently, year 1256 Ab urbe condita). The denomination 503 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.