1641 followed by 1642
1641 (MDCXLI) was a common year starting on Tuesday of the Gregorian calendar and a common year starting on Friday of the Julian calendar, the 1641st year of the Common Era (CE) and Anno Domini (AD) designations, the 641st  year of the 2nd millennium, the 41st  year of the 17th century, and the  2nd   year of the 1640s decade. As of the start of 1641, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.