521 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 500s BC 490s BC
Years:	524 BC 523 BC 522 BC – 521 BC – 520 BC 519 BC 518 BC

Politics
521 BC by topic
State leaders Sovereign states
Categories
Births Deaths Establishments Disestablishments

521 BC in other calendars
Gregorian calendar	521 BC
Ab urbe condita	233
Ancient Egypt era	XXVII dynasty, 5
- Pharaoh	Darius I of Persia, 1
Ancient Greek era	64th Olympiad, year 4
Assyrian calendar	4230
Bengali calendar	−1113
Berber calendar	430
Buddhist calendar	24
Burmese calendar	−1158
Byzantine calendar	4988–4989
Chinese calendar	己卯年 (Earth Rabbit) 2176 or 2116 — to — 庚辰年 (Metal Dragon) 2177 or 2117
Coptic calendar	−804 – −803
Discordian calendar	646
Ethiopian calendar	−528 – −527
Hebrew calendar	3240–3241
Hindu calendars
- Vikram Samvat	−464 – −463
- Shaka Samvat	N/A
- Kali Yuga	2581–2582
Holocene calendar	9480
Iranian calendar	1142 BP – 1141 BP
Islamic calendar	1177 BH – 1176 BH
Julian calendar	N/A
Korean calendar	1813
Minguo calendar	2432 before ROC 民前2432年
Thai solar calendar	22–23

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