| Millennium: | 1st millennium |
|---|---|
| Centuries: | 9th century – 10th century – 11th century |
| Decades: | 900s 910s 920s – 930s – 940s 950s 960s |
| Years: | 928 929 930 – 931 – 932 933 934 |
| 931 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 931 CMXXXI |
| Ab urbe condita | 1684 |
| Armenian calendar | 380 ԹՎ ՅՁ |
| Assyrian calendar | 5681 |
| Bahá'í calendar | -913–-912 |
| Bengali calendar | 338 |
| Berber calendar | 1881 |
| English Regnal year | N/A |
| Buddhist calendar | 1475 |
| Burmese calendar | 293 |
| Byzantine calendar | 6439–6440 |
| Chinese calendar | 庚寅年十二月初十日 (3567/3627-12-10) — to —
辛卯年十一月二十日(3568/3628-11-20) |
| Coptic calendar | 647–648 |
| Ethiopian calendar | 923–924 |
| Hebrew calendar | 4691–4692 |
| Hindu calendars | |
| - Vikram Samvat | 987–988 |
| - Shaka Samvat | 853–854 |
| - Kali Yuga | 4032–4033 |
| Holocene calendar | 10931 |
| Iranian calendar | 309–310 |
| Islamic calendar | 318–319 |
| Japanese calendar | |
| Korean calendar | 3264 |
| Minguo calendar | 981 before ROC 民前981年 |
| Thai solar calendar | 1474 |
Year 931 (CMXXXI) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar.