1739 (MDCCXXXIX) wis a common year stairtin on Fuirsday o the Gregorian calendar (dominical letter D), the 1739t year o the Common Era (CE) an Anno Domini (AD) designations, the 739t year o the 2nt millennium, the 39t year o the 18t century, an the 10t an last year o the 1730s decade atween 1583 an 1929 an wi Julian Value: 1739 is 11 calendar days difference, which continued tae be uised till the complete conversion o the Gregorian calendar wis entirely duin in 1929.