| Millennium: | 2nd millennium | 
|---|---|
| Centuries: | |
| Decades: | |
| Years: | 
| 1245 by topic | |
| Leaders | |
| Political entities - State leaders - Religious leaders | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Art and literature | |
| 1245 in poetry | |
| Gregorian calendar | 1245 MCCXLV | 
| Ab urbe condita | 1998 | 
| Armenian calendar | 694 ԹՎ ՈՂԴ | 
| Assyrian calendar | 5995 | 
| Bengali calendar | 652 | 
| Berber calendar | 2195 | 
| English Regnal year | 29 Hen. 3 – 30 Hen. 3 | 
| Buddhist calendar | 1789 | 
| Burmese calendar | 607 | 
| Byzantine calendar | 6753–6754 | 
| Chinese calendar | 甲辰年 (Wood Dragon) 3941 or 3881 — to — 乙巳年 (Wood Snake) 3942 or 3882 | 
| Coptic calendar | 961–962 | 
| Discordian calendar | 2411 | 
| Ethiopian calendar | 1237–1238 | 
| Hebrew calendar | 5005–5006 | 
| Hindu calendars | |
| - Vikram Samvat | 1301–1302 | 
| - Shaka Samvat | 1166–1167 | 
| - Kali Yuga | 4345–4346 | 
| Holocene calendar | 11245 | 
| Igbo calendar | 245–246 | 
| Iranian calendar | 623–624 | 
| Islamic calendar | 642–643 | 
| Japanese calendar | Kangen 3 (寛元3年) | 
| Javanese calendar | 1154–1155 | 
| Julian calendar | 1245 MCCXLV | 
| Korean calendar | 3578 | 
| Minguo calendar | 667 before ROC 民前667年 | 
| Nanakshahi calendar | −223 | 
| Thai solar calendar | 1787–1788 | 
Year 1245 (MCCXLV) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar.