| Millennium: | 2nd Millennium |
|---|---|
| Centuries: | 11th cent. – 12th cent. – 13th cent. |
| Decades: | 1090s 1100s 1110s – 1120s – 1130s 1140s 1150s |
| Years: | 1120 1121 1122 – 1123 – 1124 1125 1126 |
| Gregorian calendar | 1123 MCXXIII |
| Ab urbe condita | 1876 |
| Armenian calendar | 572 ԹՎ ՇՀԲ |
| Assyrian calendar | 5873 |
| Bengali calendar | 530 |
| Berber calendar | 2073 |
| English Regnal year | 23 Hen. 1 – 24 Hen. 1 |
| Buddhist calendar | 1667 |
| Burmese calendar | 485 |
| Byzantine calendar | 6631–6632 |
| Chinese calendar | 壬寅年 (Water Tiger) 3819 or 3759 — to — 癸卯年 (Water Rabbit) 3820 or 3760 |
| Coptic calendar | 839–840 |
| Discordian calendar | 2289 |
| Ethiopian calendar | 1115–1116 |
| Hebrew calendar | 4883–4884 |
| Hindu calendars | |
| - Vikram Samvat | 1179–1180 |
| - Shaka Samvat | 1044–1045 |
| - Kali Yuga | 4223–4224 |
| Holocene calendar | 11123 |
| Igbo calendar | 123–124 |
| Iranian calendar | 501–502 |
| Islamic calendar | 516–517 |
| Japanese calendar | Hōan 4 (保安４年) |
| Javanese calendar | 1028–1029 |
| Julian calendar | 1123 MCXXIII |
| Korean calendar | 3456 |
| Minguo calendar | 789 before ROC 民前789年 |
| Nanakshahi calendar | −345 |
| Seleucid era | 1434/1435 AG |
| Thai solar calendar | 1665–1666 |
The year 1123 BC