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I don't have sufficient context to write an accurate overview of "1864." The context provided only states "year," which doesn't specify whether you're referring to a historical event, a work of fiction, a scientific discovery, or another subject entirely. Could you provide more details about what "1864" refers to?
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1864 (MDCCCLXIV) was a leap year starting on Friday of the Gregorian calendar and a leap year starting on Wednesday of the Julian calendar, the 1864th year of the Common Era (CE) and Anno Domini (AD) designations, the 864th year of the 2nd millennium, the 64th year of the 19th century, and the 5th year of the 1860s decade. As of the start of 1864, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.
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