1138 (MCXXXVIII) was a common year starting on Saturday of the Julian calendar, the 1138th year of the Common Era (CE) and Anno Domini (AD) designations, the 138th year of the 2nd millennium, the 38th year of the 12th century, and the 9th year of the 1130s decade. As of the start of 1138, 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: 1100s  1110s  1120s  – 1130s –  1140s  1150s  1160s
Years: 1135 1136 113711381139 1140 1141
1138 in other calendars
Gregorian calendar1138
MCXXXVIII
Ab urbe condita1891
Armenian calendar587
ԹՎ ՇՁԷ
Assyrian calendar5888
Balinese saka calendar1059–1060
Bengali calendar545
Berber calendar2088
English Regnal yearSte. 1 – 4 Ste. 1
Buddhist calendar1682
Burmese calendar500
Byzantine calendar6646–6647
Chinese calendar丁巳(Fire Snake)
3834 or 3774
    — to —
戊午年 (Earth Horse)
3835 or 3775
Coptic calendar854–855
Discordian calendar2304
Ethiopian calendar1130–1131
Hebrew calendar4898–4899
Hindu calendars
 - Vikram Samvat1194–1195
 - Shaka Samvat1059–1060
 - Kali Yuga4238–4239
Holocene calendar11138
Igbo calendar138–139
Iranian calendar516–517
Islamic calendar532–533
Japanese calendarHōen 4
(保延4年)
Javanese calendar1044–1045
Julian calendar1138
MCXXXVIII
Korean calendar3471
Minguo calendar774 before ROC
民前774年
Nanakshahi calendar−330
Seleucid era1449/1450 AG
Thai solar calendar1680–1681
Tibetan calendar阴火蛇年
(female Fire-Snake)
1264 or 883 or 111
    — to —
阳土马年
(male Earth-Horse)
1265 or 884 or 112

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