1600 (MDC) was a century leap year starting on Saturday of the Gregorian calendar and a leap year starting on Tuesday of the Julian calendar, the 1600th year of the Common Era (CE) and Anno Domini (AD) designations, the 600th year of the 2nd millennium, the 100th and last year of the 16th century, and the 1st year of the 1600s decade. As of the start of 1600, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.
The year 1600 was the end of the 16th century and the start of the 17th century. In the Gregorian calendar, it was the first century leap year and the last until the year 2000.
