| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1855 by topic |
|---|
| Humanities |
| By country |
| Other topics |
| Lists of leaders |
| Birth and death categories |
| Establishments and disestablishments categories |
| Works category |
| Gregorian calendar | 1855 MDCCCLV |
| Ab urbe condita | 2608 |
| Armenian calendar | 1304 ԹՎ ՌՅԴ |
| Assyrian calendar | 6605 |
| Baháʼí calendar | 11–12 |
| Balinese saka calendar | 1776–1777 |
| Bengali calendar | 1262 |
| Berber calendar | 2805 |
| British Regnal year | 18 Vict. 1 – 19 Vict. 1 |
| Buddhist calendar | 2399 |
| Burmese calendar | 1217 |
| Byzantine calendar | 7363–7364 |
| Chinese calendar | 甲寅年 (Wood Tiger) 4552 or 4345 — to — 乙卯年 (Wood Rabbit) 4553 or 4346 |
| Coptic calendar | 1571–1572 |
| Discordian calendar | 3021 |
| Ethiopian calendar | 1847–1848 |
| Hebrew calendar | 5615–5616 |
| Hindu calendars | |
| - Vikram Samvat | 1911–1912 |
| - Shaka Samvat | 1776–1777 |
| - Kali Yuga | 4955–4956 |
| Holocene calendar | 11855 |
| Igbo calendar | 855–856 |
| Iranian calendar | 1233–1234 |
| Islamic calendar | 1271–1272 |
| Japanese calendar | Ansei 2 (安政２年) |
| Javanese calendar | 1783–1784 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4188 |
| Minguo calendar | 57 before ROC 民前57年 |
| Nanakshahi calendar | 387 |
| Thai solar calendar | 2397–2398 |
| Tibetan calendar | 阳木虎年 (male Wood-Tiger) 1981 or 1600 or 828 — to — 阴木兔年 (female Wood-Rabbit) 1982 or 1601 or 829 |
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1855 (MDCCCLV) was a common year starting on Monday of the Gregorian calendar and a common year starting on Saturday of the Julian calendar, the 1855th year of the Common Era (CE) and Anno Domini (AD) designations, the 855th year of the 2nd millennium, the 55th year of the 19th century, and the 6th year of the 1850s decade. As of the start of 1855, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.