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I don't have context beyond the word "year" to provide an accurate overview of "1729." To write a reliable 2-sentence explanation of what 1729 is and why it matters, I would need additional information about which specific aspect of 1729 you're asking about (such as a historical event, mathematical concept, or cultural reference).
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September 29: The seven-day Battle of Damghan starts. 1729 (MDCCXXIX) was a common year starting on Saturday of the Gregorian calendar and a common year starting on Wednesday of the Julian calendar, the 1729th year of the Common Era (CE) and Anno Domini (AD) designations, the 729th year of the 2nd millennium, the 29th year of the 18th century, and the 10th and last year of the 1720s decade. As of the start of 1729, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.
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