642 BC

Millennium: 1st millennium BC
Centuries:
Decades:
Years:
642 BC in various calendars
Gregorian calendar642 BC
DCXLII BC
Ab urbe condita112
Ancient Egypt eraXXVI dynasty, 23
- PharaohPsamtik I, 23
Ancient Greek era34th Olympiad, year 3
Assyrian calendar4109
Balinese saka calendarN/A
Bengali calendar−1234
Berber calendar309
Buddhist calendar−97
Burmese calendar−1279
Byzantine calendar4867–4868
Chinese calendar戊寅年 (Earth Tiger)
2056 or 1849
    — to —
己卯年 (Earth Rabbit)
2057 or 1850
Coptic calendar−925 – −924
Discordian calendar525
Ethiopian calendar−649 – −648
Hebrew calendar3119–3120
Hindu calendars
 - Vikram Samvat−585 – −584
 - Shaka SamvatN/A
 - Kali Yuga2459–2460
Holocene calendar9359
Iranian calendar1263 BP – 1262 BP
Islamic calendar1302 BH – 1301 BH
Javanese calendarN/A
Julian calendarN/A
Korean calendar1692
Minguo calendar2553 before ROC
民前2553年
Nanakshahi calendar−2109
Thai solar calendar−99 – −98
Tibetan calendar阳土虎年
(male Earth-Tiger)
−515 or −896 or −1668
    — to —
阴土兔年
(female Earth-Rabbit)
−514 or −895 or −1667

The year 642 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 112 Ab urbe condita . The denomination 642 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.