Back 1604 Abkhazian 1604 Afrikaans 1604 ALS 1604 እ.ኤ.አ. Amharic 1604 AN 1604 Arabic 1604 ARY 1604 ARZ 1604 AST 1604 AVK
| Millennium: | 2nd millennium |
|---|---|
| Centuries: | 16th century – 17th century – 18th century |
| Decades: | 1570s 1580s 1590s – 1600s – 1610s 1620s 1630s |
| Years: | 1601 1602 1603 – 1604 – 1605 1606 1607 |
| Gregorian calendar | 1604 MDCIV |
| Ab urbe condita | 2357 |
| Armenian calendar | 1053 ԹՎ ՌԾԳ |
| Assyrian calendar | 6354 |
| Balinese saka calendar | 1525–1526 |
| Bengali calendar | 1011 |
| Berber calendar | 2554 |
| English Regnal year | 1 Ja. 1 – 2 Ja. 1 |
| Buddhist calendar | 2148 |
| Burmese calendar | 966 |
| Byzantine calendar | 7112–7113 |
| Chinese calendar | 癸卯年 (Water Rabbit) 4300 or 4240 — to — 甲辰年 (Wood Dragon) 4301 or 4241 |
| Coptic calendar | 1320–1321 |
| Discordian calendar | 2770 |
| Ethiopian calendar | 1596–1597 |
| Hebrew calendar | 5364–5365 |
| Hindu calendars | |
| - Vikram Samvat | 1660–1661 |
| - Shaka Samvat | 1525–1526 |
| - Kali Yuga | 4704–4705 |
| Holocene calendar | 11604 |
| Igbo calendar | 604–605 |
| Iranian calendar | 982–983 |
| Islamic calendar | 1012–1013 |
| Japanese calendar | Keichō 9 (慶長９年) |
| Javanese calendar | 1524–1525 |
| Julian calendar | Gregorian minus 10 days |
| Korean calendar | 3937 |
| Minguo calendar | 308 before ROC 民前308年 |
| Nanakshahi calendar | 136 |
| Thai solar calendar | 2146–2147 |
| Tibetan calendar | 阴水兔年 (female Water-Rabbit) 1730 or 1349 or 577 — to — 阳木龙年 (male Wood-Dragon) 1731 or 1350 or 578 |
1604 (MDCIV) was a leap year starting on Thursday of the Gregorian calendar and a leap year starting on Sunday of the Julian calendar, the 1604th year of the Common Era (CE) and Anno Domini (AD) designations, the 604th year of the 2nd millennium, the 4th year of the 17th century, and the 5th year of the 1600s decade. As of the start of 1604, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.