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1823 was a year in the early 19th century when significant political and cultural developments were occurring around the world. It matters historically because events from this period helped shape modern nations and international relations, including the announcement of the Monroe Doctrine in the United States, which influenced American foreign policy for generations.
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1823 (MDCCCXXIII) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Monday of the Julian calendar, the 1823rd year of the Common Era (CE) and Anno Domini (AD) designations, the 823rd year of the 2nd millennium, the 23rd year of the 19th century, and the 4th year of the 1820s decade. As of the start of 1823, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.
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