539 BC

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

539 BC in various calendars

Gregorian calendar	539 BC DXXXIX 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
Balinese saka calendar	N/A
Bengali calendar	−1131
Berber calendar	412
Buddhist calendar	6
Burmese calendar	−1176
Byzantine calendar	4970–4971
Chinese calendar	辛酉年 (Metal Rooster) 2159 or 1952     — to — 壬戌年 (Water Dog) 2160 or 1953
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	2562–2563
Holocene calendar	9462
Iranian calendar	1160 BP – 1159 BP
Islamic calendar	1196 BH – 1195 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	1795
Minguo calendar	2450 before ROC 民前2450年
Nanakshahi calendar	−2006
Thai solar calendar	4–5
Tibetan calendar	阴金鸡年 (female Iron-Rooster) −412 or −793 or −1565     — to — 阳水狗年 (male Water-Dog) −411 or −792 or −1564

The year 539 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 215 Ab urbe condita. The denomination 539 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

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
• Belshazzar, co-regent of Babylon