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| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 204 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 204 CCIV |
| Ab urbe condita | 957 |
| Assyrian calendar | 4954 |
| Balinese saka calendar | 125–126 |
| Bengali calendar | −389 |
| Berber calendar | 1154 |
| Buddhist calendar | 748 |
| Burmese calendar | −434 |
| Byzantine calendar | 5712–5713 |
| Chinese calendar | 癸未年 (Water Goat) 2901 or 2694 — to — 甲申年 (Wood Monkey) 2902 or 2695 |
| Coptic calendar | −80 – −79 |
| Discordian calendar | 1370 |
| Ethiopian calendar | 196–197 |
| Hebrew calendar | 3964–3965 |
| Hindu calendars | |
| - Vikram Samvat | 260–261 |
| - Shaka Samvat | 125–126 |
| - Kali Yuga | 3304–3305 |
| Holocene calendar | 10204 |
| Iranian calendar | 418 BP – 417 BP |
| Islamic calendar | 431 BH – 430 BH |
| Javanese calendar | 81–82 |
| Julian calendar | 204 CCIV |
| Korean calendar | 2537 |
| Minguo calendar | 1708 before ROC 民前1708年 |
| Nanakshahi calendar | −1264 |
| Seleucid era | 515/516 AG |
| Thai solar calendar | 746–747 |
| Tibetan calendar | 阴水羊年 (female Water-Goat) 330 or −51 or −823 — to — 阳木猴年 (male Wood-Monkey) 331 or −50 or −822 |
Year 204 (CCIV) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Cilo and Flavius (or, less frequently, year 957 Ab urbe condita). The denomination 204 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.