| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1203 by topic |
|---|
| Leaders |
| Birth and death categories |
| Births – Deaths |
| Establishments and disestablishments categories |
| Establishments – Disestablishments |
| Art and literature |
| 1203 in poetry |
| Gregorian calendar | 1203 MCCIII |
| Ab urbe condita | 1956 |
| Armenian calendar | 652 ԹՎ ՈԾԲ |
| Assyrian calendar | 5953 |
| Balinese saka calendar | 1124–1125 |
| Bengali calendar | 610 |
| Berber calendar | 2153 |
| English Regnal year | 4 Joh. 1 – 5 Joh. 1 |
| Buddhist calendar | 1747 |
| Burmese calendar | 565 |
| Byzantine calendar | 6711–6712 |
| Chinese calendar | 壬戌年 (Water Dog) 3900 or 3693 — to — 癸亥年 (Water Pig) 3901 or 3694 |
| Coptic calendar | 919–920 |
| Discordian calendar | 2369 |
| Ethiopian calendar | 1195–1196 |
| Hebrew calendar | 4963–4964 |
| Hindu calendars | |
| - Vikram Samvat | 1259–1260 |
| - Shaka Samvat | 1124–1125 |
| - Kali Yuga | 4303–4304 |
| Holocene calendar | 11203 |
| Igbo calendar | 203–204 |
| Iranian calendar | 581–582 |
| Islamic calendar | 599–600 |
| Japanese calendar | Kennin 3 (建仁３年) |
| Javanese calendar | 1111–1112 |
| Julian calendar | 1203 MCCIII |
| Korean calendar | 3536 |
| Minguo calendar | 709 before ROC 民前709年 |
| Nanakshahi calendar | −265 |
| Thai solar calendar | 1745–1746 |
| Tibetan calendar | 阳水狗年 (male Water-Dog) 1329 or 948 or 176 — to — 阴水猪年 (female Water-Pig) 1330 or 949 or 177 |
Year 1203 (MCCIII) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. It was also the first year to have all digits different from each other since 1098.