1866
| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1866 in topic: |
| Humanities |
| Archaeology – Architecture – Art – Literature – Music |
| By country |
| Australia – Brazil - Canada – Denmark - France – Germany – Mexico – Norway - Philippines - Portugal– Russia - South Africa – Spain - Sweden - United Kingdom – United States |
| Other topics |
| Rail Transport – Science – Sports |
| Lists of leaders |
| Sovereign states – State leaders – Territorial governors – Religious leaders |
| Birth and death categories |
| Births – Deaths |
| Establishments and disestablishments categories |
| Establishments – Disestablishments |
| Works category |
| Works |
| Gregorian calendar | 1866 MDCCCLXVI |
| Ab urbe condita | 2619 |
| Armenian calendar | 1315 ԹՎ ՌՅԺԵ |
| Assyrian calendar | 6616 |
| Bahá'í calendar | 22–23 |
| Bengali calendar | 1273 |
| Berber calendar | 2816 |
| British Regnal year | 29 Vict. 1 – 30 Vict. 1 |
| Buddhist calendar | 2410 |
| Burmese calendar | 1228 |
| Byzantine calendar | 7374–7375 |
| Chinese calendar |
乙丑年 (Wood Ox) 4562 or 4502 — to — 丙寅年 (Fire Tiger) 4563 or 4503 |
| Coptic calendar | 1582–1583 |
| Discordian calendar | 3032 |
| Ethiopian calendar | 1858–1859 |
| Hebrew calendar | 5626–5627 |
| Hindu calendars | |
| - Vikram Samvat | 1922–1923 |
| - Shaka Samvat | 1787–1788 |
| - Kali Yuga | 4966–4967 |
| Holocene calendar | 11866 |
| Igbo calendar | 866–867 |
| Iranian calendar | 1244–1245 |
| Islamic calendar | 1282–1283 |
| Japanese calendar |
Keiō 2 (慶応２年) |
| Javanese calendar | 1794–1795 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4199 |
| Minguo calendar | 46 before ROC 民前46年 |
| Nanakshahi calendar | 398 |
| Thai solar calendar | 2408–2409 |
1866 (MDCCCLXVI) was a common year starting on Monday (dominical letter G) of the Gregorian calendar and a common year starting on Saturday (dominical letter B) of the Julian calendar, the 1866th year of the Common Era (CE) and Anno Domini (AD) designations, the 866th year of the 2nd millennium, the 66th year of the 19th century, and the 7th year of the 1860s decade. As of the start of 1866, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.
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