643 BC

Millennium:	1st millennium BC
Centuries:	8th century BC 7th century BC 6th century BC
Decades:	660s BC 650s BC 640s BC 630s BC 620s BC
Years:	646 BC 645 BC 644 BC 643 BC 642 BC 641 BC 640 BC

643 BC in various calendars
Gregorian calendar	643 BC DCXLII BC
Ab urbe condita	111
Ancient Egypt era	XXVI dynasty, 22
- Pharaoh	Psamtik I, 22
Ancient Greek era	34th Olympiad, year 2
Assyrian calendar	4108
Bengali calendar	−1235
Berber calendar	308
Buddhist calendar	−98
Burmese calendar	−1280
Byzantine calendar	4866–4867
Chinese calendar	丁丑年 (Fire Ox) 2054 or 1994 — to — 戊寅年 (Earth Tiger) 2055 or 1995
Coptic calendar	−926 – −925
Discordian calendar	524
Ethiopian calendar	−650 – −649
Hebrew calendar	3118–3119
Hindu calendars
- Vikram Samvat	−586 – −585
- Shaka Samvat	N/A
- Kali Yuga	2458–2459
Holocene calendar	9358
Iranian calendar	1264 BP – 1263 BP
Islamic calendar	1303 BH – 1302 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	1691
Minguo calendar	2554 before ROC 民前2554年
Nanakshahi calendar	−2110
Thai solar calendar	−100 – −99
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