Back 1903 Abkhazian 1903 Afrikaans 1903 ALS 1903 እ.ኤ.አ. Amharic 1903 AN 1903 Arabic 1903 ARY 1903 ARZ 1903 AST 1903 AV
| Millennium: | 2nd millennium |
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| 1903 by topic |
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| Subject |
| By country |
| Lists of leaders |
| Birth and death categories |
| Establishments and disestablishments categories |
| Works category |
| Gregorian calendar | 1903 MCMIII |
| Ab urbe condita | 2656 |
| Armenian calendar | 1352 ԹՎ ՌՅԾԲ |
| Assyrian calendar | 6653 |
| Baháʼí calendar | 59–60 |
| Balinese saka calendar | 1824–1825 |
| Bengali calendar | 1310 |
| Berber calendar | 2853 |
| British Regnal year | 2 Edw. 7 – 3 Edw. 7 |
| Buddhist calendar | 2447 |
| Burmese calendar | 1265 |
| Byzantine calendar | 7411–7412 |
| Chinese calendar | 壬寅年 (Water Tiger) 4600 or 4393 — to — 癸卯年 (Water Rabbit) 4601 or 4394 |
| Coptic calendar | 1619–1620 |
| Discordian calendar | 3069 |
| Ethiopian calendar | 1895–1896 |
| Hebrew calendar | 5663–5664 |
| Hindu calendars | |
| - Vikram Samvat | 1959–1960 |
| - Shaka Samvat | 1824–1825 |
| - Kali Yuga | 5003–5004 |
| Holocene calendar | 11903 |
| Igbo calendar | 903–904 |
| Iranian calendar | 1281–1282 |
| Islamic calendar | 1320–1321 |
| Japanese calendar | Meiji 36 (明治３６年) |
| Javanese calendar | 1832–1833 |
| Julian calendar | Gregorian minus 13 days |
| Korean calendar | 4236 |
| Minguo calendar | 9 before ROC 民前9年 |
| Nanakshahi calendar | 435 |
| Thai solar calendar | 2445–2446 |
| Tibetan calendar | 阳水虎年 (male Water-Tiger) 2029 or 1648 or 876 — to — 阴水兔年 (female Water-Rabbit) 2030 or 1649 or 877 |
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1903 (MCMIII) was a common year starting on Thursday of the Gregorian calendar and a common year starting on Wednesday of the Julian calendar, the 1903rd year of the Common Era (CE) and Anno Domini (AD) designations, the 903rd year of the 2nd millennium, the 3rd year of the 20th century, and the 4th year of the 1900s decade. As of the start of 1903, the Gregorian calendar was 13 days ahead of the Julian calendar, which remained in localized use until 1923.