| Years |
|---|
| Millennium |
| 2nd millennium |
| Centuries |
| Decades |
| Years |
| Gregorian calendar | 1003 MIII |
| Ab urbe condita | 1756 |
| Armenian calendar | 452 ԹՎ ՆԾԲ |
| Assyrian calendar | 5753 |
| Balinese saka calendar | 924–925 |
| Bengali calendar | 410 |
| Berber calendar | 1953 |
| English Regnal year | N/A |
| Buddhist calendar | 1547 |
| Burmese calendar | 365 |
| Byzantine calendar | 6511–6512 |
| Chinese calendar | 壬寅年 (Water Tiger) 3699 or 3639 — to — 癸卯年 (Water Rabbit) 3700 or 3640 |
| Coptic calendar | 719–720 |
| Discordian calendar | 2169 |
| Ethiopian calendar | 995–996 |
| Hebrew calendar | 4763–4764 |
| Hindu calendars | |
| - Vikram Samvat | 1059–1060 |
| - Shaka Samvat | 924–925 |
| - Kali Yuga | 4103–4104 |
| Holocene calendar | 11003 |
| Igbo calendar | 3–4 |
| Iranian calendar | 381–382 |
| Islamic calendar | 393–394 |
| Japanese calendar | Chōhō 5 (長保5年) |
| Javanese calendar | 905–906 |
| Julian calendar | 1003 MIII |
| Korean calendar | 3336 |
| Minguo calendar | 909 before ROC 民前909年 |
| Nanakshahi calendar | −465 |
| Seleucid era | 1314/1315 AG |
| Thai solar calendar | 1545–1546 |
| Tibetan calendar | ཆུ་ཕོ་སྟག་ལོ་ (male Water-Tiger) 1129 or 748 or −24 — to — ཆུ་མོ་ཡོས་ལོ་ (female Water-Hare) 1130 or 749 or −23 |
1003 (MIII) was a common year starting on Friday of the Julian calendar, the 1003rd year of the Common Era (CE) and Anno Domini (AD) designations, the 3rd year of the 2nd millennium, the 3rd year of the 11th century, and the 4th year of the 1000s decade. As of the start of 1003, the Gregorian calendar was 6 days ahead of the Julian calendar, which was the dominant calendar of the time.
