| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1845 by topic |
|---|
| Humanities |
| By country |
| Other topics |
| Lists of leaders |
| Birth and death categories |
| Establishments and disestablishments categories |
| Works category |
| Gregorian calendar | 1845 MDCCCXLV |
| Ab urbe condita | 2598 |
| Armenian calendar | 1294 ԹՎ ՌՄՂԴ |
| Assyrian calendar | 6595 |
| Baháʼí calendar | 1–2 |
| Balinese saka calendar | 1766–1767 |
| Bengali calendar | 1252 |
| Berber calendar | 2795 |
| British Regnal year | 8 Vict. 1 – 9 Vict. 1 |
| Buddhist calendar | 2389 |
| Burmese calendar | 1207 |
| Byzantine calendar | 7353–7354 |
| Chinese calendar | 甲辰年 (Wood Dragon) 4542 or 4335 — to — 乙巳年 (Wood Snake) 4543 or 4336 |
| Coptic calendar | 1561–1562 |
| Discordian calendar | 3011 |
| Ethiopian calendar | 1837–1838 |
| Hebrew calendar | 5605–5606 |
| Hindu calendars | |
| - Vikram Samvat | 1901–1902 |
| - Shaka Samvat | 1766–1767 |
| - Kali Yuga | 4945–4946 |
| Holocene calendar | 11845 |
| Igbo calendar | 845–846 |
| Iranian calendar | 1223–1224 |
| Islamic calendar | 1260–1262 |
| Japanese calendar | Kōka 2 (弘化２年) |
| Javanese calendar | 1772–1773 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4178 |
| Minguo calendar | 67 before ROC 民前67年 |
| Nanakshahi calendar | 377 |
| Thai solar calendar | 2387–2388 |
| Tibetan calendar | 阳木龙年 (male Wood-Dragon) 1971 or 1590 or 818 — to — 阴木蛇年 (female Wood-Snake) 1972 or 1591 or 819 |
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1845 (MDCCCXLV) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Monday of the Julian calendar, the 1845th year of the Common Era (CE) and Anno Domini (AD) designations, the 845th year of the 2nd millennium, the 45th year of the 19th century, and the 6th year of the 1840s decade. As of the start of 1845, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.