| Millennium: | 1st Millennium |
|---|---|
| Centuries: | 2nd cent. – 3rd cent. – 4th cent. |
| Decades: | 190s 200s 210s – 220s – 230s 240s 250s |
| Years: | 225 226 227 – 228 – 229 230 231 |
| Gregorian calendar | 228 CCXXVIII |
| Ab urbe condita | 981 |
| Assyrian calendar | 4978 |
| Bengali calendar | −365 |
| Berber calendar | 1178 |
| Buddhist calendar | 772 |
| Burmese calendar | −410 |
| Byzantine calendar | 5736–5737 |
| Chinese calendar | 丁未年 (Fire Goat) 2924 or 2864 — to — 戊申年 (Earth Monkey) 2925 or 2865 |
| Coptic calendar | −56 – −55 |
| Discordian calendar | 1394 |
| Ethiopian calendar | 220–221 |
| Hebrew calendar | 3988–3989 |
| Hindu calendars | |
| - Vikram Samvat | 284–285 |
| - Shaka Samvat | 149–150 |
| - Kali Yuga | 3328–3329 |
| Holocene calendar | 10228 |
| Iranian calendar | 394 BP – 393 BP |
| Islamic calendar | 406 BH – 405 BH |
| Javanese calendar | 106–107 |
| Julian calendar | 228 CCXXVIII |
| Korean calendar | 2561 |
| Minguo calendar | 1684 before ROC 民前1684年 |
| Nanakshahi calendar | −1240 |
| Seleucid era | 539/540 AG |
| Thai solar calendar | 770–771 |
The year 228 BC