1178 (MCLXXVIII) was a common year starting on Sunday of the Julian calendar, the 1178th year of the Common Era (CE) and Anno Domini (AD) designations, the 178th year of the 2nd millennium, the 78th year of the 12th century, and the 9th year of the 1170s decade. As of the start of 1178, 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: 1175 1176 117711781179 1180 1181
1178 in other calendars
Gregorian calendar1178
MCLXXVIII
Ab urbe condita1931
Armenian calendar627
ԹՎ ՈԻԷ
Assyrian calendar5928
Balinese saka calendar1099–1100
Bengali calendar585
Berber calendar2128
English Regnal year24 Hen. 2 – 25 Hen. 2
Buddhist calendar1722
Burmese calendar540
Byzantine calendar6686–6687
Chinese calendar丁酉(Fire Rooster)
3874 or 3814
    — to —
戊戌年 (Earth Dog)
3875 or 3815
Coptic calendar894–895
Discordian calendar2344
Ethiopian calendar1170–1171
Hebrew calendar4938–4939
Hindu calendars
 - Vikram Samvat1234–1235
 - Shaka Samvat1099–1100
 - Kali Yuga4278–4279
Holocene calendar11178
Igbo calendar178–179
Iranian calendar556–557
Islamic calendar573–574
Japanese calendarJishō 2
(治承2年)
Javanese calendar1085–1086
Julian calendar1178
MCLXXVIII
Korean calendar3511
Minguo calendar734 before ROC
民前734年
Nanakshahi calendar−290
Seleucid era1489/1490 AG
Thai solar calendar1720–1721
Tibetan calendar阴火鸡年
(female Fire-Rooster)
1304 or 923 or 151
    — to —
阳土狗年
(male Earth-Dog)
1305 or 924 or 152

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