661

Millennium: 1st millennium
Centuries:
Decades:
Years:
661 in various calendars
Gregorian calendar661
DCLXI
Ab urbe condita1414
Armenian calendar110
ԹՎ ՃԺ
Assyrian calendar5411
Balinese saka calendar582–583
Bengali calendar68
Berber calendar1611
Buddhist calendar1205
Burmese calendar23
Byzantine calendar6169–6170
Chinese calendar庚申年 (Metal Monkey)
3358 or 3151
    — to —
辛酉年 (Metal Rooster)
3359 or 3152
Coptic calendar377–378
Discordian calendar1827
Ethiopian calendar653–654
Hebrew calendar4421–4422
Hindu calendars
 - Vikram Samvat717–718
 - Shaka Samvat582–583
 - Kali Yuga3761–3762
Holocene calendar10661
Iranian calendar39–40
Islamic calendar40–41
Japanese calendarHakuchi 12
(白雉12年)
Javanese calendar552–553
Julian calendar661
DCLXI
Korean calendar2994
Minguo calendar1251 before ROC
民前1251年
Nanakshahi calendar−807
Seleucid era972/973 AG
Thai solar calendar1203–1204
Tibetan calendar阳金猴年
(male Iron-Monkey)
787 or 406 or −366
    — to —
阴金鸡年
(female Iron-Rooster)
788 or 407 or −365
Expansion of the caliphate under the Umayyads:
  Expansion under Muhammad, 622–632
  Expansion during the Rashidun Caliphate, 632–661
  Expansion during the Umayyad Caliphate, 661–750

Year 661 (DCLXI) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. The denomination 661 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.