1178

Millennium:	2nd millennium
Centuries:	11th century – 12th century – 13th century
Decades:	1140s  1150s  1160s  – 1170s –  1180s  1190s  1200s
Years:	1175 1176 1177 – 1178 – 1179 1180 1181

1178 in other calendars

Gregorian calendar	1178 MCLXXVIII
Ab urbe condita	1931
Armenian calendar	627 ԹՎ ՈԻԷ
Assyrian calendar	5928
Balinese saka calendar	1099–1100
Bengali calendar	585
Berber calendar	2128
English Regnal year	24 Hen. 2 – 25 Hen. 2
Buddhist calendar	1722
Burmese calendar	540
Byzantine calendar	6686–6687
Chinese calendar	丁酉年 (Fire Rooster) 3874 or 3814     — to — 戊戌年 (Earth Dog) 3875 or 3815
Coptic calendar	894–895
Discordian calendar	2344
Ethiopian calendar	1170–1171
Hebrew calendar	4938–4939
Hindu calendars
- Vikram Samvat	1234–1235
- Shaka Samvat	1099–1100
- Kali Yuga	4278–4279
Holocene calendar	11178
Igbo calendar	178–179
Iranian calendar	556–557
Islamic calendar	573–574
Japanese calendar	Jishō 2 (治承２年)
Javanese calendar	1085–1086
Julian calendar	1178 MCLXXVIII
Korean calendar	3511
Minguo calendar	734 before ROC 民前734年
Nanakshahi calendar	−290
Seleucid era	1489/1490 AG
Thai solar calendar	1720–1721
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

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.

Events

• June 18 – Five Canterbury monks see what was possibly the Giordano Bruno crater being formed
• The Sung Document written detailing the discovery of "Mu-Lan-Pi" (suggested by some to be California) by Muslim sailors
• The Chronicle of Gervase of Canterbury written
• The Leaning Tower of Pisa begins to lean as the third level is completed