| Centuries: | 6th century · 7th century · 8th century |
| Decades: | 570s 580s 590s 600s 610s 620s 630s |
| Years: | 601 602 603 604 605 606 607 |
| 604 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 604 DCIV |
| Ab urbe condita | 1357 |
| Armenian calendar | 53 ԹՎ ԾԳ |
| Bahá'í calendar | -1240 – -1239 |
| Bengali calendar | 11 |
| Berber calendar | 1554 |
| Buddhist calendar | 1148 |
| Burmese calendar | -34 |
| Byzantine calendar | 6112 – 6113 |
| Chinese calendar | 癸亥年十一月廿四日 (3240/3300-11-24) — to —
甲子年十二月初五日(3241/3301-12-5) |
| Coptic calendar | 320 – 321 |
| Ethiopian calendar | 596 – 597 |
| Hebrew calendar | 4364 – 4365 |
| Hindu calendars | |
| - Bikram Samwat | 660 – 661 |
| - Shaka Samvat | 526 – 527 |
| - Kali Yuga | 3705 – 3706 |
| Holocene calendar | 10604 |
| Iranian calendar | 18 BP – 17 BP |
| Islamic calendar | 19 BH – 18 BH |
| Japanese calendar | |
| Korean calendar | 2937 |
| Thai solar calendar | 1147 |