1801
| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1801 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 | 1801 MDCCCI |
| French Republican calendar | 9–10 |
| Ab urbe condita | 2554 |
| Armenian calendar | 1250 ԹՎ ՌՄԾ |
| Assyrian calendar | 6551 |
| Bengali calendar | 1208 |
| Berber calendar | 2751 |
| British Regnal year | 41 Geo. 3 – 42 Geo. 3 |
| Buddhist calendar | 2345 |
| Burmese calendar | 1163 |
| Byzantine calendar | 7309–7310 |
| Chinese calendar |
庚申年 (Metal Monkey) 4497 or 4437 — to — 辛酉年 (Metal Rooster) 4498 or 4438 |
| Coptic calendar | 1517–1518 |
| Discordian calendar | 2967 |
| Ethiopian calendar | 1793–1794 |
| Hebrew calendar | 5561–5562 |
| Hindu calendars | |
| - Vikram Samvat | 1857–1858 |
| - Shaka Samvat | 1722–1723 |
| - Kali Yuga | 4901–4902 |
| Holocene calendar | 11801 |
| Igbo calendar | 801–802 |
| Iranian calendar | 1179–1180 |
| Islamic calendar | 1215–1216 |
| Japanese calendar |
Kansei 13 (寛政１３年) |
| Javanese calendar | 1727–1728 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4134 |
| Minguo calendar | 111 before ROC 民前111年 |
| Nanakshahi calendar | 333 |
| Thai solar calendar | 2343–2344 |
1801 (MDCCCI) was a common year starting on Thursday (dominical letter D) of the Gregorian calendar and a common year starting on Tuesday (dominical letter F) of the Julian calendar, the 1801st year of the Common Era (CE) and Anno Domini (AD) designations, the 801st year of the 2nd millennium, the 1st year of the 19th century, and the 2nd year of the 1800s decade. As of the start of 1801, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.
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