Back 1203 Abkhazian 1203 Afrikaans 1203 ALS 1203 እ.ኤ.አ. Amharic 1203 AN 1203 Arabic 1203 ARZ 1203 AST 1203 AVK 1203 Azerbaijani
| Millennium: | 2nd millennium |
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| Centuries: | |
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| Years: | |
| 1203 by topic |
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| 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 | 609–610 |
| 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 of the Julian calendar. It was also the first year to have all digits different from each other since 1098.