| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | 2nd century BC – 1st century BC – 1st century |
| Decades: | 30s BC 20s BC 10s BC – 0s BC – 0s 10s 20s |
| Years: | 7 BC 6 BC 5 BC – 4 BC – 3 BC 2 BC 1 BC |
| 4 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 4 BC |
| Ab urbe condita | 750 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1847 – -1846 |
| Bengali calendar | -596 |
| Berber calendar | 947 |
| Buddhist calendar | 541 |
| Burmese calendar | -641 |
| Byzantine calendar | 5505 – 5506 |
| Chinese calendar | 丙辰年 (2633/2693) — to —
丁巳年(2634/2694) |
| Coptic calendar | -287 – -286 |
| Ethiopian calendar | -11 – -10 |
| Hebrew calendar | 3757 – 3758 |
| Hindu calendars | |
| - Bikram Samwat | 53 – 54 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 3098 – 3099 |
| Holocene calendar | 9997 |
| Iranian calendar | 625 BP – 624 BP |
| Islamic calendar | 644 BH – 643 BH |
| Japanese calendar | |
| Korean calendar | 2330 |
| Thai solar calendar | 540 |
Year 4 BC was a common year starting on Monday (link will display the full calendar) of the Julian calendar.