639 BC

Millennium:	1st millennium BC
Centuries:	8th century BC 7th century BC 6th century BC
Decades:	650s BC 640s BC 630s BC 620s BC 610s BC
Years:	642 BC 641 BC 640 BC 639 BC 638 BC 637 BC 636 BC

639 BC in various calendars

Gregorian calendar	639 BC DCXXXIX BC
Ab urbe condita	115
Ancient Egypt era	XXVI dynasty, 26
- Pharaoh	Psamtik I, 26
Ancient Greek era	35th Olympiad, year 2
Assyrian calendar	4112
Balinese saka calendar	N/A
Bengali calendar	−1231
Berber calendar	312
Buddhist calendar	−94
Burmese calendar	−1276
Byzantine calendar	4870–4871
Chinese calendar	辛巳年 (Metal Snake) 2059 or 1852     — to — 壬午年 (Water Horse) 2060 or 1853
Coptic calendar	−922 – −921
Discordian calendar	528
Ethiopian calendar	−646 – −645
Hebrew calendar	3122–3123
Hindu calendars
- Vikram Samvat	−582 – −581
- Shaka Samvat	N/A
- Kali Yuga	2462–2463
Holocene calendar	9362
Iranian calendar	1260 BP – 1259 BP
Islamic calendar	1299 BH – 1298 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	1695
Minguo calendar	2550 before ROC 民前2550年
Nanakshahi calendar	−2106
Thai solar calendar	−96 – −95
Tibetan calendar	阴金蛇年 (female Iron-Snake) −512 or −893 or −1665     — to — 阳水马年 (male Water-Horse) −511 or −892 or −1664

The year 639 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 115 Ab urbe condita . The denomination 639 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.