666

666 in other calendars
Gregorian calendar	666; DCLXVI
Ab urbe condita	1419
Armenian calendar	115; ԹՎ ՃԺԵ
Assyrian calendar	5416
Balinese saka calendar	587–588
Bengali calendar	73
Berber calendar	1616
Buddhist calendar	1210
Burmese calendar	28
Byzantine calendar	6174–6175
Chinese calendar	乙丑年 (Wood Ox); 3362 or 3302; — to —; 丙寅年 (Fire Tiger); 3363 or 3303
Coptic calendar	382–383
Discordian calendar	1832
Ethiopian calendar	658–659
Hebrew calendar	4426–4427
Hindu calendars
- Vikram Samvat	722–723
- Shaka Samvat	587–588
- Kali Yuga	3766–3767
Holocene calendar	10666
Iranian calendar	44–45
Islamic calendar	45–46
Japanese calendar	N/A
Javanese calendar	557–558
Julian calendar	666; DCLXVI
Korean calendar	2999
Minguo calendar	1246 before ROC; 民前1246年
Nanakshahi calendar	−802
Seleucid era	977/978 AG
Thai solar calendar	1208–1209
Tibetan calendar	阴木牛年; (female Wood-Ox); 792 or 411 or −361; — to —; 阳火虎年; (male Fire-Tiger); 793 or 412 or −360

Millennium:	1st millennium
Centuries:	6th century – 7th century – 8th century
Decades:	630s 640s 650s – 660s – 670s 680s 690s
Years:	663 664 665 – 666 – 667 668 669

666 (DCLXVI) was a common year starting on Thursday of the Julian calendar, the 666th year of the Common Era (CE) and Anno Domini (AD) designations, the 666th year of the 1st millennium, the 66th year of the 7th century, and the 7th year of the 660s decade. As of the start of 666, the Gregorian calendar was 3 days ahead of the Julian calendar, which was the dominant calendar of the time.

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