1656 followed by 1657
1656 (MDCLVI) was a leap year starting on Saturday of the Gregorian calendar and a leap year starting on Tuesday of the Julian calendar, the 1656th year of the Common Era (CE) and Anno Domini (AD) designations, the 656th  year of the 2nd millennium, the 56th  year of the 17th century, and the  7th   year of the 1650s decade. As of the start of 1656, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.