| Millennium: | 3rd Millennium |
|---|---|
| Centuries: | 20th cent. – 21st cent. – 22nd cent. |
| Decades: | 1970s 1980s 1990s – 2000s – 2010s 2020s 2030s |
| Years: | 2001 2002 2003 – 2004 – 2005 2006 2007 |
| Gregorian calendar | 2004 MMIV |
| Ab urbe condita | 2757 |
| Armenian calendar | 1453 ԹՎ ՌՆԾԳ |
| Assyrian calendar | 6754 |
| Bahá'í calendar | 160–161 |
| Bengali calendar | 1411 |
| Berber calendar | 2954 |
| British Regnal year | 52 Eliz. 2 – 53 Eliz. 2 |
| Buddhist calendar | 2548 |
| Burmese calendar | 1366 |
| Byzantine calendar | 7512–7513 |
| Chinese calendar | 癸未年 (Water Goat) 4700 or 4640 — to — 甲申年 (Wood Monkey) 4701 or 4641 |
| Coptic calendar | 1720–1721 |
| Discordian calendar | 3170 |
| Ethiopian calendar | 1996–1997 |
| Hebrew calendar | 5764–5765 |
| Hindu calendars | |
| - Vikram Samvat | 2060–2061 |
| - Shaka Samvat | 1925–1926 |
| - Kali Yuga | 5104–5105 |
| Holocene calendar | 12004 |
| Igbo calendar | 1004–1005 |
| Iranian calendar | 1382–1383 |
| Islamic calendar | 1424–1425 |
| Japanese calendar | Heisei 16 (平成１６年) |
| Javanese calendar | 1936–1937 |
| Juche calendar | 93 |
| Julian calendar | Gregorian minus 13 days |
| Korean calendar | 4337 |
| Minguo calendar | ROC 93 民國93年 |
| Nanakshahi calendar | 536 |
| Thai solar calendar | 2547 |
| Unix time | 1072915200–1104537599 |
The year 2004 BC
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