1686 followed by 1687
1686 (MDCLXXXVI) was a common year starting on Tuesday of the Gregorian calendar and a common year starting on Friday of the Julian calendar, the 1686th year of the Common Era (CE) and Anno Domini (AD) designations, the 686th  year of the 2nd millennium, the 86th  year of the 17th century, and the  7th   year of the 1680s decade. As of the start of 1686, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.