661 (DCLXI) was a common year starting on Friday of the Julian calendar, the 661st year of the Common Era (CE) and Anno Domini (AD) designations, the 661st year of the 1st millennium, the 61st year of the 7th century, and the 2nd year of the 660s decade. As of the start of 661, the Gregorian calendar was 3 days ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium: 1st millennium
Centuries: 6th century7th century8th century
Decades: 630s  640s  650s  – 660s –  670s  680s  690s
Years: 658 659 660661662 663 664
661 in other 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(Metal Monkey)
3357 or 3297
    — to —
辛酉年 (Metal Rooster)
3358 or 3298
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 calendarN/A
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

Events

change
  • A series of wars begin between the Byzantine Empire and the Sassanid Empire.


Deaths

for more information, see Category:661 deaths.