668 BC

668 BC in various calendars
Gregorian calendar	668 BC; DCLXVIII BC
Ab urbe condita	86
Ancient Egypt era	XXV dynasty, 85
- Pharaoh	Taharqa, 23
Ancient Greek era	28th Olympiad (victor)¹
Assyrian calendar	4083
Balinese saka calendar	N/A
Bengali calendar	−1260
Berber calendar	283
Buddhist calendar	−123
Burmese calendar	−1305
Byzantine calendar	4841–4842
Chinese calendar	壬子年 (Water Rat); 2030 or 1823; — to —; 癸丑年 (Water Ox); 2031 or 1824
Coptic calendar	−951 – −950
Discordian calendar	499
Ethiopian calendar	−675 – −674
Hebrew calendar	3093–3094
Hindu calendars
- Vikram Samvat	−611 – −610
- Shaka Samvat	N/A
- Kali Yuga	2433–2434
Holocene calendar	9333
Iranian calendar	1289 BP – 1288 BP
Islamic calendar	1329 BH – 1328 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	1666
Minguo calendar	2579 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

Millennium:	1st millennium BC
Centuries:	8th century BC; 7th century BC ; 6th century BC;
Decades:	680s BC; 670s BC; 660s BC ; 650s BC; 640s BC;
Years:	671 BC; 670 BC; 669 BC; 668 BC ; 667 BC; 666 BC; 665 BC;

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.

Gregorian calendar	668 BC DCLXVIII BC
Ab urbe condita	86
Ancient Egypt era	XXV dynasty, 85
- Pharaoh	Taharqa, 23
Ancient Greek era	28th Olympiad (victor )¹
Assyrian calendar	4083
Balinese saka calendar	N/A
Bengali calendar	−1260
Berber calendar	283
Buddhist calendar	−123
Burmese calendar	−1305
Byzantine calendar	4841–4842
Chinese calendar	壬子年 (Water Rat) 2030 or 1823 — to — 癸丑年 (Water Ox) 2031 or 1824
Coptic calendar	−951 – −950
Discordian calendar	499
Ethiopian calendar	−675 – −674
Hebrew calendar	3093–3094
Hindu calendars
- Vikram Samvat	−611 – −610
- Shaka Samvat	N/A
- Kali Yuga	2433–2434
Holocene calendar	9333
Iranian calendar	1289 BP – 1288 BP
Islamic calendar	1329 BH – 1328 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	1666
Minguo calendar	2579 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