668 BC

Millennium: 1st millennium BC
Centuries:
Decades:
Years:
668 BC in various calendars
Gregorian calendar668 BC
DCLXVIII BC
Ab urbe condita86
Ancient Egypt eraXXV dynasty, 85
- PharaohTaharqa, 23
Ancient Greek era28th Olympiad (victor
Assyrian calendar4083
Balinese saka calendarN/A
Bengali calendar−1260
Berber calendar283
Buddhist calendar−123
Burmese calendar−1305
Byzantine calendar4841–4842
Chinese calendar壬子年 (Water Rat)
2030 or 1823
    — to —
癸丑年 (Water Ox)
2031 or 1824
Coptic calendar−951 – −950
Discordian calendar499
Ethiopian calendar−675 – −674
Hebrew calendar3093–3094
Hindu calendars
 - Vikram Samvat−611 – −610
 - Shaka SamvatN/A
 - Kali Yuga2433–2434
Holocene calendar9333
Iranian calendar1289 BP – 1288 BP
Islamic calendar1329 BH – 1328 BH
Javanese calendarN/A
Julian calendarN/A
Korean calendar1666
Minguo calendar2579 before ROC
民前2579年
Nanakshahi calendar−2135
Thai solar calendar−125 – −124
Tibetan calendar阳水鼠年
(male Water-Rat)
−541 or −922 or −1694
    — to —
阴水牛年
(female Water-Ox)
−540 or −921 or −1693

The year 668 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 86 Ab urbe condita . The denomination 668 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.