1045
| Years | 
|---|
| Millennium | 
| 2nd millennium | 
| Centuries | 
| Decades | 
| Years | 
| 1045 by topic | 
|---|
| Leaders | 
| 
 | 
| Birth and death categories | 
| Births – Deaths | 
| Establishments and disestablishments categories | 
| Establishments – Disestablishments | 
| Gregorian calendar | 1045 MXLV | 
| Ab urbe condita | 1798 | 
| Armenian calendar | 494 ԹՎ ՆՂԴ | 
| Assyrian calendar | 5795 | 
| Balinese saka calendar | 966–967 | 
| Bengali calendar | 451–452 | 
| Berber calendar | 1995 | 
| English Regnal year | N/A | 
| Buddhist calendar | 1589 | 
| Burmese calendar | 407 | 
| Byzantine calendar | 6553–6554 | 
| Chinese calendar | 甲申年 (Wood Monkey) 3742 or 3535 — to — 乙酉年 (Wood Rooster) 3743 or 3536 | 
| Coptic calendar | 761–762 | 
| Discordian calendar | 2211 | 
| Ethiopian calendar | 1037–1038 | 
| Hebrew calendar | 4805–4806 | 
| Hindu calendars | |
| - Vikram Samvat | 1101–1102 | 
| - Shaka Samvat | 966–967 | 
| - Kali Yuga | 4145–4146 | 
| Holocene calendar | 11045 | 
| Igbo calendar | 45–46 | 
| Iranian calendar | 423–424 | 
| Islamic calendar | 436–437 | 
| Japanese calendar | Kantoku 2 (寛徳2年) | 
| Javanese calendar | 948–949 | 
| Julian calendar | 1045 MXLV | 
| Korean calendar | 3378 | 
| Minguo calendar | 867 before ROC 民前867年 | 
| Nanakshahi calendar | −423 | 
| Seleucid era | 1356/1357 AG | 
| Thai solar calendar | 1587–1588 | 
| Tibetan calendar | 阳木猴年 (male Wood-Monkey) 1171 or 790 or 18 — to — 阴木鸡年 (female Wood-Rooster) 1172 or 791 or 19 | 
Year 1045 (MXLV) was a common year starting on Tuesday of the Julian calendar.