1173 (MCLXXIII) was a common year starting on Monday of the Julian calendar, the 1173rd year of the Common Era (CE) and Anno Domini (AD) designations, the 173rd year of the 2nd millennium, the 73rd year of the 12th century, and the 4th year of the 1170s decade. As of the start of 1173, 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: 1170 1171 117211731174 1175 1176
1173 in other calendars
Gregorian calendar1173
MCLXXIII
Ab urbe condita1926
Armenian calendar622
ԹՎ ՈԻԲ
Assyrian calendar5923
Balinese saka calendar1094–1095
Bengali calendar580
Berber calendar2123
English Regnal year19 Hen. 2 – 20 Hen. 2
Buddhist calendar1717
Burmese calendar535
Byzantine calendar6681–6682
Chinese calendar壬辰(Water Dragon)
3869 or 3809
    — to —
癸巳年 (Water Snake)
3870 or 3810
Coptic calendar889–890
Discordian calendar2339
Ethiopian calendar1165–1166
Hebrew calendar4933–4934
Hindu calendars
 - Vikram Samvat1229–1230
 - Shaka Samvat1094–1095
 - Kali Yuga4273–4274
Holocene calendar11173
Igbo calendar173–174
Iranian calendar551–552
Islamic calendar568–569
Japanese calendarJōan 3
(承安3年)
Javanese calendar1080–1081
Julian calendar1173
MCLXXIII
Korean calendar3506
Minguo calendar739 before ROC
民前739年
Nanakshahi calendar−295
Seleucid era1484/1485 AG
Thai solar calendar1715–1716
Tibetan calendar阳水龙年
(male Water-Dragon)
1299 or 918 or 146
    — to —
阴水蛇年
(female Water-Snake)
1300 or 919 or 147

Events change