| Centuries: | 2nd century · 3rd century · 4th century |
| Decades: | 180s 190s 200s 210s 220s 230s 240s |
| Years: | 209 210 211 212 213 214 215 |
| 212 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 212 CCXII |
| Ab urbe condita | 965 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1632 – -1631 |
| Bengali calendar | -381 |
| Berber calendar | 1162 |
| Buddhist calendar | 756 |
| Burmese calendar | -426 |
| Byzantine calendar | 5720 – 5721 |
| Chinese calendar | 辛卯年十一月初十日 (2848/2908-11-10) — to —
壬辰年十一月廿一日(2849/2909-11-21) |
| Coptic calendar | -72 – -71 |
| Ethiopian calendar | 204 – 205 |
| Hebrew calendar | 3972 – 3973 |
| Hindu calendars | |
| - Bikram Samwat | 268 – 269 |
| - Shaka Samvat | 134 – 135 |
| - Kali Yuga | 3313 – 3314 |
| Holocene calendar | 10212 |
| Iranian calendar | 410 BP – 409 BP |
| Islamic calendar | 423 BH – 422 BH |
| Japanese calendar | |
| Korean calendar | 2545 |
| Thai solar calendar | 755 |