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I appreciate your request, but the context provided only states "year" without any information about what "1857" specifically refers to or why it matters. To write an accurate overview based solely on the context given, I cannot provide meaningful content since no substantive information about 1857 has been provided. If you could share more context about what "1857" refers to (such as a historical event, book, film, or other subject), I'd be happy to write the overview you've requested.
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May 10: The Sepoy Mutiny breaks out in British India.
1857 (MDCCCLVII) was a common year starting on Thursday of the Gregorian calendar and a common year starting on Tuesday of the Julian calendar, the 1857th year of the Common Era (CE) and Anno Domini (AD) designations, the 857th year of the 2nd millennium, the 57th year of the 19th century, and the 8th year of the 1850s decade. As of the start of 1857, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.