1847 (MDCCCXLVII) was a common year starting on Friday of the Gregorian calendar and a common year starting on Wednesday of the Julian calendar, the 1847th year of the Common Era (CE) and Anno Domini (AD) designations, the 847th year of the 2nd millennium, the 47th year of the 19th century, and the 8th year of the 1840s decade. As of the start of 1847, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.