| Millennium: | 1st Millennium BC |
|---|---|
| Centuries: | 7th cent. BC – 6th cent. BC – 5th cent. BC |
| Decades: | 530s BC 520s BC 510s BC – 500s BC – 490s BC 480s BC 470s BC |
| Years: | 512 BC 511 BC 510 BC – 509 BC – 508 BC 507 BC 506 BC |
| Gregorian calendar | 509 DIX |
| Ab urbe condita | 1262 |
| Assyrian calendar | 5259 |
| Bengali calendar | −84 |
| Berber calendar | 1459 |
| Buddhist calendar | 1053 |
| Burmese calendar | −129 |
| Byzantine calendar | 6017–6018 |
| Chinese calendar | 戊子年 (Earth Rat) 3205 or 3145 — to — 己丑年 (Earth Ox) 3206 or 3146 |
| Coptic calendar | 225–226 |
| Discordian calendar | 1675 |
| Ethiopian calendar | 501–502 |
| Hebrew calendar | 4269–4270 |
| Hindu calendars | |
| - Vikram Samvat | 565–566 |
| - Shaka Samvat | 430–431 |
| - Kali Yuga | 3609–3610 |
| Holocene calendar | 10509 |
| Iranian calendar | 113 BP – 112 BP |
| Islamic calendar | 117 BH – 115 BH |
| Javanese calendar | 395–396 |
| Julian calendar | 509 DIX |
| Korean calendar | 2842 |
| Minguo calendar | 1403 before ROC 民前1403年 |
| Nanakshahi calendar | −959 |
| Seleucid era | 820/821 AG |
| Thai solar calendar | 1051–1052 |
The year 509 BC