1589 (MDLXXXIX) was a common year starting on Sunday of the Gregorian calendar and a common year starting on Wednesday of the Julian calendar, the 1589th year of the Common Era (CE) and Anno Domini (AD) designations, the 589th year of the 2nd millennium, the 89th year of the 16th century, and the 10th and last year of the 1580s decade. As of the start of 1589, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.