| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1865 by topic |
|---|
| Humanities |
| By country |
| Other topics |
| Lists of leaders |
| Birth and death categories |
| Establishments and disestablishments categories |
| Works category |
| Gregorian calendar | 1865 MDCCCLXV |
| Ab urbe condita | 2618 |
| Armenian calendar | 1314 ԹՎ ՌՅԺԴ |
| Assyrian calendar | 6615 |
| Baháʼí calendar | 21–22 |
| Balinese saka calendar | 1786–1787 |
| Bengali calendar | 1272 |
| Berber calendar | 2815 |
| British Regnal year | 28 Vict. 1 – 29 Vict. 1 |
| Buddhist calendar | 2409 |
| Burmese calendar | 1227 |
| Byzantine calendar | 7373–7374 |
| Chinese calendar | 甲子年 (Wood Rat) 4562 or 4355 — to — 乙丑年 (Wood Ox) 4563 or 4356 |
| Coptic calendar | 1581–1582 |
| Discordian calendar | 3031 |
| Ethiopian calendar | 1857–1858 |
| Hebrew calendar | 5625–5626 |
| Hindu calendars | |
| - Vikram Samvat | 1921–1922 |
| - Shaka Samvat | 1786–1787 |
| - Kali Yuga | 4965–4966 |
| Holocene calendar | 11865 |
| Igbo calendar | 865–866 |
| Iranian calendar | 1243–1244 |
| Islamic calendar | 1281–1282 |
| Japanese calendar | Genji 2 / Keiō 1 (慶応元年) |
| Javanese calendar | 1793–1794 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4198 |
| Minguo calendar | 47 before ROC 民前47年 |
| Nanakshahi calendar | 397 |
| Thai solar calendar | 2407–2408 |
| Tibetan calendar | 阳木鼠年 (male Wood-Rat) 1991 or 1610 or 838 — to — 阴木牛年 (female Wood-Ox) 1992 or 1611 or 839 |
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1865 (MDCCCLXV) was a common year starting on Sunday of the Gregorian calendar and a common year starting on Friday of the Julian calendar, the 1865th year of the Common Era (CE) and Anno Domini (AD) designations, the 865th year of the 2nd millennium, the 65th year of the 19th century, and the 6th year of the 1860s decade. As of the start of 1865, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.