| Years |
|---|
| Millennium |
| 2nd millennium |
| Centuries |
| Decades |
| Years |
| Gregorian calendar | 1303 MCCCIII |
| Ab urbe condita | 2056 |
| Armenian calendar | 752 ԹՎ ՉԾԲ |
| Assyrian calendar | 6053 |
| Balinese saka calendar | 1224–1225 |
| Bengali calendar | 710 |
| Berber calendar | 2253 |
| English Regnal year | 31 Edw. 1 – 32 Edw. 1 |
| Buddhist calendar | 1847 |
| Burmese calendar | 665 |
| Byzantine calendar | 6811–6812 |
| Chinese calendar | 壬寅年 (Water Tiger) 3999 or 3939 — to — 癸卯年 (Water Rabbit) 4000 or 3940 |
| Coptic calendar | 1019–1020 |
| Discordian calendar | 2469 |
| Ethiopian calendar | 1295–1296 |
| Hebrew calendar | 5063–5064 |
| Hindu calendars | |
| - Vikram Samvat | 1359–1360 |
| - Shaka Samvat | 1224–1225 |
| - Kali Yuga | 4403–4404 |
| Holocene calendar | 11303 |
| Igbo calendar | 303–304 |
| Iranian calendar | 681–682 |
| Islamic calendar | 702–703 |
| Japanese calendar | Kengen 2 / Kagen 1 (嘉元元年) |
| Javanese calendar | 1214–1215 |
| Julian calendar | 1303 MCCCIII |
| Korean calendar | 3636 |
| Minguo calendar | 609 before ROC 民前609年 |
| Nanakshahi calendar | −165 |
| Thai solar calendar | 1845–1846 |
| Tibetan calendar | ཆུ་ཕོ་སྟག་ལོ་ (male Water-Tiger) 1429 or 1048 or 276 — to — ཆུ་མོ་ཡོས་ལོ་ (female Water-Hare) 1430 or 1049 or 277 |
1303 (MCCCIII) was a common year starting on Tuesday of the Julian calendar, the 1303rd year of the Common Era (CE) and Anno Domini (AD) designations, the 303rd year of the 2nd millennium, the 3rd year of the 14th century, and the 4th year of the 1300s decade. As of the start of 1303, the Gregorian calendar was 8 days ahead of the Julian calendar, which was the dominant calendar of the time.