539 BC

Millennium:	1st millennium BC
Centuries:	7th century BC – 6th century BC – 5th century BC
Decades:	560s BC 550s BC 540s BC – 530s BC – 520s BC 510s BC 500s BC
Years:	542 BC 541 BC 540 BC – 539 BC – 538 BC 537 BC 536 BC

Politics
539 BC by topic
State leaders Sovereign states
Categories
Births Deaths Establishments Disestablishments

539 BC in other calendars
Gregorian calendar	539 BC
Ab urbe condita	215
Ancient Egypt era	XXVI dynasty, 126
- Pharaoh	Amasis II, 32
Ancient Greek era	60th Olympiad, year 2
Assyrian calendar	4212
Bengali calendar	−1131
Berber calendar	412
Buddhist calendar	6
Burmese calendar	−1176
Byzantine calendar	4970–4971
Chinese calendar	辛酉年 (Metal Rooster) 2158 or 2098 — to — 壬戌年 (Water Dog) 2159 or 2099
Coptic calendar	−822 – −821
Discordian calendar	628
Ethiopian calendar	−546 – −545
Hebrew calendar	3222–3223
Hindu calendars
- Vikram Samvat	−482 – −481
- Shaka Samvat	N/A
- Kali Yuga	2563–2564
Holocene calendar	9462
Iranian calendar	1160 BP – 1159 BP
Islamic calendar	1196 BH – 1195 BH
Julian calendar	N/A
Korean calendar	1795
Minguo calendar	2450 before ROC 民前2450年
Thai solar calendar	4–5

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Events

The Cyrus cylinder: a contemporary cuneiform script proclaims Cyrus the Great as legitimate king of Babylon.

September 25–28? – Battle of Opis: Troops of the Persian Achaemenid Empire under Cyrus the Great decisively defeat those of the Neo-Babylonian Empire.
October 7 – Achaemenid troops under Gobryas enter Babylon unopposed. On October 29 Cyrus enters the city. Incorporating the Neo-Babylonian Empire into the Achaemenid Empire makes the latter into the largest in the history of the world.