| Millennium: | 2nd millennium |
|---|---|
| Centuries: | 12th century – 13th century – 14th century |
| Decades: | 1200s 1210s 1220s – 1230s – 1240s 1250s 1260s |
| Years: | 1228 1229 1230 – 1231 – 1232 1233 1234 |
| 1231 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Art and literature | |
| 1231 in poetry | |
| Gregorian calendar | 1231 MCCXXXI |
| Ab urbe condita | 1984 |
| Armenian calendar | 680 ԹՎ ՈՁ |
| Bahá'í calendar | -613 – -612 |
| Bengali calendar | 638 |
| Berber calendar | 2181 |
| Buddhist calendar | 1775 |
| Burmese calendar | 593 |
| Byzantine calendar | 6739 – 6740 |
| Chinese calendar | 庚寅年十一月廿七日 (3867/3927-11-27) — to —
辛卯年十二月初七日(3868/3928-12-7) |
| Coptic calendar | 947 – 948 |
| Ethiopian calendar | 1223 – 1224 |
| Hebrew calendar | 4991 – 4992 |
| Hindu calendars | |
| - Bikram Samwat | 1287 – 1288 |
| - Shaka Samvat | 1153 – 1154 |
| - Kali Yuga | 4332 – 4333 |
| Holocene calendar | 11231 |
| Iranian calendar | 609 – 610 |
| Islamic calendar | 628 – 629 |
| Japanese calendar | |
| Korean calendar | 3564 |
| Thai solar calendar | 1774 |