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

539 BC in other calendars

Gregorian calendar	539 BC DXXXVIII 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

Events

By place

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

Near East

• 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.

Deaths

• Nabonidus, last king of Babylon