| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 845 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 845 DCCCXLV |
| Ab urbe condita | 1598 |
| Armenian calendar | 294 ԹՎ ՄՂԴ |
| Assyrian calendar | 5595 |
| Balinese saka calendar | 766–767 |
| Bengali calendar | 252 |
| Berber calendar | 1795 |
| Buddhist calendar | 1389 |
| Burmese calendar | 207 |
| Byzantine calendar | 6353–6354 |
| Chinese calendar | 甲子年 (Wood Rat) 3542 or 3335 — to — 乙丑年 (Wood Ox) 3543 or 3336 |
| Coptic calendar | 561–562 |
| Discordian calendar | 2011 |
| Ethiopian calendar | 837–838 |
| Hebrew calendar | 4605–4606 |
| Hindu calendars | |
| - Vikram Samvat | 901–902 |
| - Shaka Samvat | 766–767 |
| - Kali Yuga | 3945–3946 |
| Holocene calendar | 10845 |
| Iranian calendar | 223–224 |
| Islamic calendar | 230–231 |
| Japanese calendar | Jōwa 12 (承和１２年) |
| Javanese calendar | 742–743 |
| Julian calendar | 845 DCCCXLV |
| Korean calendar | 3178 |
| Minguo calendar | 1067 before ROC 民前1067年 |
| Nanakshahi calendar | −623 |
| Seleucid era | 1156/1157 AG |
| Thai solar calendar | 1387–1388 |
| Tibetan calendar | 阳木鼠年 (male Wood-Rat) 971 or 590 or −182 — to — 阴木牛年 (female Wood-Ox) 972 or 591 or −181 |
Year 845 (DCCCXLV) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.