1129 (MCXXIX) was a common year starting on Tuesday of the Julian calendar, the 1129th year of the Common Era (CE) and Anno Domini (AD) designations, the 129th year of the 2nd millennium, the 29th year of the 12th century, and the 10th and last year of the 1120s decade. As of the start of 1129, 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: 1090s  1100s  1110s  – 1120s –  1130s  1140s  1150s
Years: 1126 1127 112811291130 1131 1132
1129 in other calendars
Gregorian calendar1129
MCXXIX
Ab urbe condita1882
Armenian calendar578
ԹՎ ՇՀԸ
Assyrian calendar5879
Balinese saka calendar1050–1051
Bengali calendar536
Berber calendar2079
English Regnal year29 Hen. 1 – 30 Hen. 1
Buddhist calendar1673
Burmese calendar491
Byzantine calendar6637–6638
Chinese calendar戊申(Earth Monkey)
3825 or 3765
    — to —
己酉年 (Earth Rooster)
3826 or 3766
Coptic calendar845–846
Discordian calendar2295
Ethiopian calendar1121–1122
Hebrew calendar4889–4890
Hindu calendars
 - Vikram Samvat1185–1186
 - Shaka Samvat1050–1051
 - Kali Yuga4229–4230
Holocene calendar11129
Igbo calendar129–130
Iranian calendar507–508
Islamic calendar523–524
Japanese calendarDaiji 4
(大治4年)
Javanese calendar1034–1035
Julian calendar1129
MCXXIX
Korean calendar3462
Minguo calendar783 before ROC
民前783年
Nanakshahi calendar−339
Seleucid era1440/1441 AG
Thai solar calendar1671–1672
Tibetan calendar阳土猴年
(male Earth-Monkey)
1255 or 874 or 102
    — to —
阴土鸡年
(female Earth-Rooster)
1256 or 875 or 103

Deaths change