| Millennium: | 1st millennium |
|---|---|
| Centuries: | 2nd century – 3rd century – 4th century |
| Decades: | 190s 200s 210s – 220s – 230s 240s 250s |
| Years: | 225 226 227 – 228 – 229 230 231 |
| 228 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 228 CCXXVIII |
| Ab urbe condita | 981 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1616 – -1615 |
| Bengali calendar | -365 |
| Berber calendar | 1178 |
| Buddhist calendar | 772 |
| Burmese calendar | -410 |
| Byzantine calendar | 5736 – 5737 |
| Chinese calendar | 丁未年十二月初七日 (2864/2924-12-7) — to —
戊申年十一月十八日(2865/2925-11-18) |
| Coptic calendar | -56 – -55 |
| Ethiopian calendar | 220 – 221 |
| Hebrew calendar | 3988 – 3989 |
| Hindu calendars | |
| - Bikram Samwat | 284 – 285 |
| - Shaka Samvat | 150 – 151 |
| - Kali Yuga | 3329 – 3330 |
| Holocene calendar | 10228 |
| Iranian calendar | 394 BP – 393 BP |
| Islamic calendar | 406 BH – 405 BH |
| Japanese calendar | |
| Korean calendar | 2561 |
| Thai solar calendar | 771 |