| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
|
| Gregorian calendar | 203 CCIII |
| Ab urbe condita | 956 |
| Assyrian calendar | 4953 |
| Balinese saka calendar | 124–125 |
| Bengali calendar | −390 |
| Berber calendar | 1153 |
| Buddhist calendar | 747 |
| Burmese calendar | −435 |
| Byzantine calendar | 5711–5712 |
| Chinese calendar | 壬午年 (Water Horse) 2899 or 2839 — to — 癸未年 (Water Goat) 2900 or 2840 |
| Coptic calendar | −81 – −80 |
| Discordian calendar | 1369 |
| Ethiopian calendar | 195–196 |
| Hebrew calendar | 3963–3964 |
| Hindu calendars | |
| - Vikram Samvat | 259–260 |
| - Shaka Samvat | 124–125 |
| - Kali Yuga | 3303–3304 |
| Holocene calendar | 10203 |
| Iranian calendar | 419 BP – 418 BP |
| Islamic calendar | 432 BH – 431 BH |
| Javanese calendar | 80–81 |
| Julian calendar | 203 CCIII |
| Korean calendar | 2536 |
| Minguo calendar | 1709 before ROC 民前1709年 |
| Nanakshahi calendar | −1265 |
| Seleucid era | 514/515 AG |
| Thai solar calendar | 745–746 |
| Tibetan calendar | 阳水马年 (male Water-Horse) 329 or −52 or −824 — to — 阴水羊年 (female Water-Goat) 330 or −51 or −823 |
Year 203 (CCIII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Plautianus and Geta (or, less frequently, year 956 Ab urbe condita). The denomination 203 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.
Events
By place
Roman Empire
- Emperor Septimius Severus rebuilds Byzantium.
- Gaius Fulvius Plautianus and Publius Septimius Geta become Roman Consuls.
- An arch dedicated to Severus is erected near the Forum.
- The Portico of Octavia is reconstructed.
India
- Reign, in India, of Vijaya, Satavahana king of the Andhra.
- The Andhra empire is being broken apart into smaller and smaller independent principalities.
China
- Sun Quan battles Huang Zu at the Battle of Xiakou.
By topic
Religion
- Origen of Alexandria replaces Clement as the head of the Christian school in Alexandria.
Births
- Zhuge Ke, son of Zhuge Jin, officer of the Wu Kingdom (d. 253)
Deaths
- Felicitas, Christian saint (martyred)
- Ling Cao, general under Sun Ce and father of Ling Tong (killed by pirate Gan Ning)
- Perpetua, Christian saint (martyred)
- Sun Yi, younger brother of Sun Quan (b. 184)
- Wu Jing, general of the Han dynasty and brother-in-law of Sun Jian