1594 (MDXCIV) was a common year starting on Saturday of the Gregorian calendar and a common year starting on Tuesday of the Julian calendar, the 1594th year of the Common Era (CE) and Anno Domini (AD) designations, the 594th year of the 2nd millennium, the 94th year of the 16th century, and the 5th year of the 1590s decade. As of the start of 1594, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.