| Millennium: | 2nd Millennium |
|---|---|
| Centuries: | 10th cent. – 11th cent. – 12th cent. |
| Decades: | 1060s 1070s 1080s – 1090s – 1100s 1110s 1120s |
| Years: | 1087 1088 1089 – 1090 – 1091 1092 1093 |
| Gregorian calendar | 1090 MXC |
| Ab urbe condita | 1843 |
| Armenian calendar | 539 ԹՎ ՇԼԹ |
| Assyrian calendar | 5840 |
| Bengali calendar | 497 |
| Berber calendar | 2040 |
| English Regnal year | 3 Will. 2 – 4 Will. 2 |
| Buddhist calendar | 1634 |
| Burmese calendar | 452 |
| Byzantine calendar | 6598–6599 |
| Chinese calendar | 己巳年 (Earth Snake) 3786 or 3726 — to — 庚午年 (Metal Horse) 3787 or 3727 |
| Coptic calendar | 806–807 |
| Discordian calendar | 2256 |
| Ethiopian calendar | 1082–1083 |
| Hebrew calendar | 4850–4851 |
| Hindu calendars | |
| - Vikram Samvat | 1146–1147 |
| - Shaka Samvat | 1011–1012 |
| - Kali Yuga | 4190–4191 |
| Holocene calendar | 11090 |
| Igbo calendar | 90–91 |
| Iranian calendar | 468–469 |
| Islamic calendar | 482–483 |
| Japanese calendar | Kanji 4 (寛治４年) |
| Javanese calendar | 994–995 |
| Julian calendar | 1090 MXC |
| Korean calendar | 3423 |
| Minguo calendar | 822 before ROC 民前822年 |
| Nanakshahi calendar | −378 |
| Seleucid era | 1401/1402 AG |
| Thai solar calendar | 1632–1633 |
The year 1090 BC