420 BC

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Millennium: 1st millennium BC
Centuries: 6th century BC5th century BC4th century BC
Decades: 450s BC  440s BC  430s BC  – 420s BC –  410s BC  400s BC  390s BC
Years: 423 BC 422 BC 421 BC420 BC419 BC 418 BC 417 BC
420 BC in other calendars
Gregorian calendar 420 BC
Ab urbe condita 334
Armenian calendar N/A
Assyrian calendar 4331
Bahá'í calendar −2263 – −2262
Bengali calendar −1012
Berber calendar 531
English Regnal year N/A
Buddhist calendar 125
Burmese calendar −1057
Byzantine calendar 5089–5090
Chinese calendar 庚申(Metal Monkey)
2277 or 2217
    — to —
辛酉年 (Metal Rooster)
2278 or 2218
Coptic calendar −703 – −702
Discordian calendar 747
Ethiopian calendar −427 – −426
Hebrew calendar 3341–3342
Hindu calendars
 - Vikram Samvat −363 – −362
 - Shaka Samvat N/A
 - Kali Yuga 2682–2683
Holocene calendar 9581
Igbo calendar −1419 – −1418
Iranian calendar 1041 BP – 1040 BP
Islamic calendar 1073 BH – 1072 BH
Japanese calendar N/A
Juche calendar N/A
Julian calendar N/A
Korean calendar 1914
Minguo calendar 2331 before ROC
民前2331年
Thai solar calendar 124

Year 420 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Cincinnatus and Medullinus (or, less frequently, year 334 Ab urbe condita). The denomination 420 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.

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Plato 428

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