1777 (MDCCLXXVII) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1777th year of the Common Era (CE) and Anno Domini (AD) designations, the 777th year of the 2nd millennium, the 77th year of the 18th century, and the 8th year of the 1770s decade. As of the start of 1777, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.