| Centuries: | 5th century · 6th century · 7th century |
| Decades: | 490s 500s 510s 520s 530s 540s 550s |
| Years: | 517 518 519 520 521 522 523 |
| 520 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 520 DXX |
| Ab urbe condita | 1273 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1324 – -1323 |
| Bengali calendar | -73 |
| Berber calendar | 1470 |
| Buddhist calendar | 1064 |
| Burmese calendar | -118 |
| Byzantine calendar | 6028 – 6029 |
| Chinese calendar | 己亥年十一月廿六日 (3156/3216-11-26) — to —
庚子年十二月初七日(3157/3217-12-7) |
| Coptic calendar | 236 – 237 |
| Ethiopian calendar | 512 – 513 |
| Hebrew calendar | 4280 – 4281 |
| Hindu calendars | |
| - Bikram Samwat | 576 – 577 |
| - Shaka Samvat | 442 – 443 |
| - Kali Yuga | 3621 – 3622 |
| Holocene calendar | 10520 |
| Iranian calendar | 102 BP – 101 BP |
| Islamic calendar | 105 BH – 104 BH |
| Japanese calendar | |
| Korean calendar | 2853 |
| Thai solar calendar | 1063 |