1662 (MDCLXII) was a common year starting on Sunday of the Gregorian calendar and a common year starting on Wednesday of the Julian calendar, the 1662nd year of the Common Era (CE) and Anno Domini (AD) designations, the 662nd year of the 2nd millennium, the 62nd year of the 17th century, and the 3rd year of the 1660s decade. As of the start of 1662, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.