| Millennium: | 1st millennium |
|---|---|
| Centuries: | 1st century – 2nd century – 3rd century |
| Decades: | 90s 100s 110s – 120s – 130s 140s 150s |
| Years: | 121 122 123 – 124 – 125 126 127 |
| 124 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 124 CXXIV |
| Ab urbe condita | 877 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1720 – -1719 |
| Bengali calendar | -469 |
| Berber calendar | 1074 |
| Buddhist calendar | 668 |
| Burmese calendar | -514 |
| Byzantine calendar | 5632 – 5633 |
| Chinese calendar | 癸亥年十一月廿七日 (2760/2820-11-27) — to —
甲子年十一月初八日(2761/2821-11-8) |
| Coptic calendar | -160 – -159 |
| Ethiopian calendar | 116 – 117 |
| Hebrew calendar | 3884 – 3885 |
| Hindu calendars | |
| - Bikram Samwat | 180 – 181 |
| - Shaka Samvat | 46 – 47 |
| - Kali Yuga | 3225 – 3226 |
| Holocene calendar | 10124 |
| Iranian calendar | 498 BP – 497 BP |
| Islamic calendar | 513 BH – 512 BH |
| Japanese calendar | |
| Korean calendar | 2457 |
| Thai solar calendar | 667 |
Year 124 (CXXIV) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar.