| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1243 by topic |
|---|
| Leaders |
| Birth and death categories |
| Births – Deaths |
| Establishments and disestablishments categories |
| Establishments – Disestablishments |
| Art and literature |
| 1243 in poetry |
| Gregorian calendar | 1243 MCCXLIII |
| Ab urbe condita | 1996 |
| Armenian calendar | 692 ԹՎ ՈՂԲ |
| Assyrian calendar | 5993 |
| Balinese saka calendar | 1164–1165 |
| Bengali calendar | 650 |
| Berber calendar | 2193 |
| English Regnal year | 27 Hen. 3 – 28 Hen. 3 |
| Buddhist calendar | 1787 |
| Burmese calendar | 605 |
| Byzantine calendar | 6751–6752 |
| Chinese calendar | 壬寅年 (Water Tiger) 3940 or 3733 — to — 癸卯年 (Water Rabbit) 3941 or 3734 |
| Coptic calendar | 959–960 |
| Discordian calendar | 2409 |
| Ethiopian calendar | 1235–1236 |
| Hebrew calendar | 5003–5004 |
| Hindu calendars | |
| - Vikram Samvat | 1299–1300 |
| - Shaka Samvat | 1164–1165 |
| - Kali Yuga | 4343–4344 |
| Holocene calendar | 11243 |
| Igbo calendar | 243–244 |
| Iranian calendar | 621–622 |
| Islamic calendar | 640–641 |
| Japanese calendar | Ninji 4 / Kangen 1 (寛元元年) |
| Javanese calendar | 1152–1153 |
| Julian calendar | 1243 MCCXLIII |
| Korean calendar | 3576 |
| Minguo calendar | 669 before ROC 民前669年 |
| Nanakshahi calendar | −225 |
| Thai solar calendar | 1785–1786 |
| Tibetan calendar | 阳水虎年 (male Water-Tiger) 1369 or 988 or 216 — to — 阴水兔年 (female Water-Rabbit) 1370 or 989 or 217 |
Year 1243 (MCCXLIII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.