| 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 |
| Bahá'í calendar | -1341 – -1340 |
| Bengali calendar | -90 |
| Berber calendar | 1453 |
| 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 | |
| - Bikram Samwat | 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 |
| Thai solar calendar | 1046 |