1171 (MCLXXI) was a common year starting on Friday of the Julian calendar, the 1171st year of the Common Era (CE) and Anno Domini (AD) designations, the 171st year of the 2nd millennium, the 71st year of the 12th century, and the 2nd year of the 1170s decade. As of the start of 1171, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium: 2nd millennium
Centuries: 11th century12th century13th century
Decades: 1140s  1150s  1160s  – 1170s –  1180s  1190s  1200s
Years: 1168 1169 117011711172 1173 1174
1171 in other calendars
Gregorian calendar1171
MCLXXI
Ab urbe condita1924
Armenian calendar620
ԹՎ ՈԻ
Assyrian calendar5921
Balinese saka calendar1092–1093
Bengali calendar578
Berber calendar2121
English Regnal year17 Hen. 2 – 18 Hen. 2
Buddhist calendar1715
Burmese calendar533
Byzantine calendar6679–6680
Chinese calendar庚寅(Metal Tiger)
3867 or 3807
    — to —
辛卯年 (Metal Rabbit)
3868 or 3808
Coptic calendar887–888
Discordian calendar2337
Ethiopian calendar1163–1164
Hebrew calendar4931–4932
Hindu calendars
 - Vikram Samvat1227–1228
 - Shaka Samvat1092–1093
 - Kali Yuga4271–4272
Holocene calendar11171
Igbo calendar171–172
Iranian calendar549–550
Islamic calendar566–567
Japanese calendarKaō 3 / Jōan 1
(承安元年)
Javanese calendar1078–1079
Julian calendar1171
MCLXXI
Korean calendar3504
Minguo calendar741 before ROC
民前741年
Nanakshahi calendar−297
Seleucid era1482/1483 AG
Thai solar calendar1713–1714
Tibetan calendar阳金虎年
(male Iron-Tiger)
1297 or 916 or 144
    — to —
阴金兔年
(female Iron-Rabbit)
1298 or 917 or 145

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