1772 (MDCCLXXII) was a leap year starting on Wednesday of the Gregorian calendar and a leap year starting on Sunday of the Julian calendar, the 1772nd year of the Common Era (CE) and Anno Domini (AD) designations, the 772nd year of the 2nd millennium, the 72nd year of the 18th century, and the 3rd year of the 1770s decade. As of the start of 1772, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.