| Millennium: | 2nd Millennium BC |
|---|---|
| Centuries: | 17th cent. BC – 16th cent. BC – 15th cent. BC |
| Decades: | 1550s BC 1540s BC 1530s BC – 1520s BC – 1510s BC 1500s BC 1490s BC |
| Years: | 1523 BC 1522 BC 1521 BC – 1520 BC – 1519 BC 1518 BC 1517 BC |
| Gregorian calendar | 1520 MDXX |
| Ab urbe condita | 2273 |
| Armenian calendar | 969 ԹՎ ՋԿԹ |
| Assyrian calendar | 6270 |
| Bengali calendar | 927 |
| Berber calendar | 2470 |
| English Regnal year | 11 Hen. 8 – 12 Hen. 8 |
| Buddhist calendar | 2064 |
| Burmese calendar | 882 |
| Byzantine calendar | 7028–7029 |
| Chinese calendar | 己卯年 (Earth Rabbit) 4216 or 4156 — to — 庚辰年 (Metal Dragon) 4217 or 4157 |
| Coptic calendar | 1236–1237 |
| Discordian calendar | 2686 |
| Ethiopian calendar | 1512–1513 |
| Hebrew calendar | 5280–5281 |
| Hindu calendars | |
| - Vikram Samvat | 1576–1577 |
| - Shaka Samvat | 1441–1442 |
| - Kali Yuga | 4620–4621 |
| Holocene calendar | 11520 |
| Igbo calendar | 520–521 |
| Iranian calendar | 898–899 |
| Islamic calendar | 926–927 |
| Japanese calendar | Eishō 17 (永正１７年) |
| Javanese calendar | 1437–1438 |
| Julian calendar | 1520 MDXX |
| Korean calendar | 3853 |
| Minguo calendar | 392 before ROC 民前392年 |
| Nanakshahi calendar | 52 |
| Thai solar calendar | 2062–2063 |
The year 1520 BC