1803
| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1803 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 | 1803 MDCCCIII |
| French Republican calendar | 11–12 |
| Ab urbe condita | 2556 |
| Armenian calendar | 1252 ԹՎ ՌՄԾԲ |
| Assyrian calendar | 6553 |
| Bengali calendar | 1210 |
| Berber calendar | 2753 |
| British Regnal year | 43 Geo. 3 – 44 Geo. 3 |
| Buddhist calendar | 2347 |
| Burmese calendar | 1165 |
| Byzantine calendar | 7311–7312 |
| Chinese calendar |
壬戌年 (Water Dog) 4499 or 4439 — to — 癸亥年 (Water Pig) 4500 or 4440 |
| Coptic calendar | 1519–1520 |
| Discordian calendar | 2969 |
| Ethiopian calendar | 1795–1796 |
| Hebrew calendar | 5563–5564 |
| Hindu calendars | |
| - Vikram Samvat | 1859–1860 |
| - Shaka Samvat | 1724–1725 |
| - Kali Yuga | 4903–4904 |
| Holocene calendar | 11803 |
| Igbo calendar | 803–804 |
| Iranian calendar | 1181–1182 |
| Islamic calendar | 1217–1218 |
| Japanese calendar |
Kyōwa 2 (享和２年) |
| Javanese calendar | 1729–1730 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4136 |
| Minguo calendar | 109 before ROC 民前109年 |
| Nanakshahi calendar | 335 |
| Thai solar calendar | 2345–2346 |
1803 (MDCCCIII) was a common year starting on Saturday (dominical letter B) of the Gregorian calendar and a common year starting on Thursday (dominical letter D) of the Julian calendar, the 1803rd year of the Common Era (CE) and Anno Domini (AD) designations, the 803rd year of the 2nd millennium, the 3rd year of the 19th century, and the 4th year of the 1800s decade. As of the start of 1803, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.
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