| Millennium: | 1st millennium |
|---|---|
| Centuries: | 2nd century – 3rd century – 4th century |
| Decades: | 210s 220s 230s – 240s – 250s 260s 270s |
| Years: | 240 241 242 – 243 – 244 245 246 |
| 243 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 243 CCXLIII |
| Ab urbe condita | 996 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1601 – -1600 |
| Bengali calendar | -350 |
| Berber calendar | 1193 |
| Buddhist calendar | 787 |
| Burmese calendar | -395 |
| Byzantine calendar | 5751 – 5752 |
| Chinese calendar | 壬戌年十一月廿三日 (2879/2939-11-23) — to —
癸亥年十二月初三日(2880/2940-12-3) |
| Coptic calendar | -41 – -40 |
| Ethiopian calendar | 235 – 236 |
| Hebrew calendar | 4003 – 4004 |
| Hindu calendars | |
| - Bikram Samwat | 299 – 300 |
| - Shaka Samvat | 165 – 166 |
| - Kali Yuga | 3344 – 3345 |
| Holocene calendar | 10243 |
| Iranian calendar | 379 BP – 378 BP |
| Islamic calendar | 391 BH – 390 BH |
| Japanese calendar | |
| Korean calendar | 2576 |
| Thai solar calendar | 786 |