1636 followed by 1637
1636 (MDCXXXVI) was a leap year starting on Tuesday of the Gregorian calendar and a leap year starting on Friday of the Julian calendar, the 1636th year of the Common Era (CE) and Anno Domini (AD) designations, the 636th  year of the 2nd millennium, the 36th  year of the 17th century, and the  7th   year of the 1630s decade. As of the start of 1636, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.