1755 followed by 1756
1755 (MDCCLV) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1755th year of the Common Era (CE) and Anno Domini (AD) designations, the 755th  year of the 2nd millennium, the 55th  year of the 18th century, and the  6th   year of the 1750s decade. As of the start of 1755, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.