621 BC

Millennium:	1st millennium BC
Centuries:	8th century BC 7th century BC 6th century BC
Decades:	640s BC 630s BC 620s BC 610s BC 600s BC
Years:	624 BC 623 BC 622 BC 621 BC 620 BC 619 BC 618 BC

621 BC in various calendars
Gregorian calendar	621 BC DCXX BC
Ab urbe condita	133
Ancient Egypt era	XXVI dynasty, 44
- Pharaoh	Psamtik I, 44
Ancient Greek era	39th Olympiad, year 4
Assyrian calendar	4130
Bengali calendar	−1213
Berber calendar	330
Buddhist calendar	−76
Burmese calendar	−1258
Byzantine calendar	4888–4889
Chinese calendar	己亥年 (Earth Pig) 2076 or 2016 — to — 庚子年 (Metal Rat) 2077 or 2017
Coptic calendar	−904 – −903
Discordian calendar	546
Ethiopian calendar	−628 – −627
Hebrew calendar	3140–3141
Hindu calendars
- Vikram Samvat	−564 – −563
- Shaka Samvat	N/A
- Kali Yuga	2480–2481
Holocene calendar	9380
Iranian calendar	1242 BP – 1241 BP
Islamic calendar	1280 BH – 1279 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	1713
Minguo calendar	2532 before ROC 民前2532年
Nanakshahi calendar	−2088
Thai solar calendar	−78 – −77
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