1749 followed by 1750
1749 (MDCCXLIX) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1749th year of the Common Era (CE) and Anno Domini (AD) designations, the 749th  year of the 2nd millennium, the 49th  year of the 18th century, and the  10th  and last year of the 1740s decade. As of the start of 1749, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.