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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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Events
April–June
July–September
October–December
Undated
January–June
July–December
date unknown
January–June
July–December
Date unknown
References
1803 Wikipedia(Text) CC BY-SA