1588

1588 (MDLXXXVIII) was a leap year starting on Friday of the Gregorian calendar and a leap year starting on Monday of the Julian calendar, the 1588th year of the Common Era (CE) and Anno Domini (AD) designations, the 588th year of the 2nd millennium, the 88th year of the 16th century, and the 9th year of the 1580s decade. As of the start of 1588, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.