1747 (MDCCXLVII) was a common year starting on Sunday of the Gregorian calendar and a common year starting on Thursday of the Julian calendar, the 1747th year of the Common Era (CE) and Anno Domini (AD) designations, the 747th year of the 2nd millennium, the 47th year of the 18th century, and the 8th year of the 1740s decade. As of the start of 1747, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.