521 BC

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Millennium: 1st millennium BC
Centuries:
Decades:
Years:
521 BC in various calendars
Gregorian calendar521 BC
DXX BC
Ab urbe condita233
Ancient Egypt eraXXVII dynasty, 5
- PharaohDarius I of Persia, 1
Ancient Greek era64th Olympiad, year 4
Assyrian calendar4230
Balinese saka calendarN/A
Bengali calendar−1113
Berber calendar430
Buddhist calendar24
Burmese calendar−1158
Byzantine calendar4988–4989
Chinese calendar己卯(Earth Rabbit)
2176 or 2116
    — to —
庚辰年 (Metal Dragon)
2177 or 2117
Coptic calendar−804 – −803
Discordian calendar646
Ethiopian calendar−528 – −527
Hebrew calendar3240–3241
Hindu calendars
 - Vikram Samvat−464 – −463
 - Shaka SamvatN/A
 - Kali Yuga2580–2581
Holocene calendar9480
Iranian calendar1142 BP – 1141 BP
Islamic calendar1177 BH – 1176 BH
Javanese calendarN/A
Julian calendarN/A
Korean calendar1813
Minguo calendar2432 before ROC
民前2432年
Nanakshahi calendar−1988
Thai solar calendar22–23
Tibetan calendar阴土兔年
(female Earth-Rabbit)
−394 or −775 or −1547
    — to —
阳金龙年
(male Iron-Dragon)
−393 or −774 or −1546

The year 521 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 233 Ab urbe condita. The denomination 521 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[edit]

By place[edit]

Persian Empire[edit]

Births[edit]

Deaths[edit]

References[edit]