423 BC

Millennium:	1st millennium BC
Centuries:	6th century BC 5th century BC 4th century BC
Decades:	440s BC 430s BC 420s BC 410s BC 400s BC
Years:	426 BC 425 BC 424 BC 423 BC 422 BC 421 BC 420 BC

423 BC in various calendars

Gregorian calendar	423 BC CDXXII BC
Ab urbe condita	331
Ancient Egypt era	XXVII dynasty, 103
- Pharaoh	Darius II of Persia, 1
Ancient Greek era	89th Olympiad, year 2
Assyrian calendar	4328
Bengali calendar	−1015
Berber calendar	528
Buddhist calendar	122
Burmese calendar	−1060
Byzantine calendar	5086–5087
Chinese calendar	丁巳年 (Fire Snake) 2274 or 2214     — to — 戊午年 (Earth Horse) 2275 or 2215
Coptic calendar	−706 – −705
Discordian calendar	744
Ethiopian calendar	−430 – −429
Hebrew calendar	3338–3339
Hindu calendars
- Vikram Samvat	−366 – −365
- Shaka Samvat	N/A
- Kali Yuga	2678–2679
Holocene calendar	9578
Iranian calendar	1044 BP – 1043 BP
Islamic calendar	1076 BH – 1075 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	1911
Minguo calendar	2334 before ROC 民前2334年
Nanakshahi calendar	−1890
Thai solar calendar	120–121
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Year 423 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Atratinus and Ambustus (or, less frequently, year 331 Ab urbe condita). The denomination 423 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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