1671 followed by 1672
1671 (MDCLXXI) was a common year starting on Thursday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1671st year of the Common Era (CE) and Anno Domini (AD) designations, the 671st  year of the 2nd millennium, the 71st  year of the 17th century, and the  2nd   year of the 1670s decade. As of the start of 1671, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.