1601

1601 (MDCI) was a common year starting on Monday of the Gregorian calendar and a common year starting on Thursday of the Julian calendar. As of the start of 1601, the Gregorian calendar was 10 days ahead of the Julian calendar. This epoch is the beginning of the 400-year Gregorian leap-year cycle within which digital files first existed; the last year of any such cycle is the only leap year whose year number is divisible by 100.

1601

1601 (MDCI) was a common year starting on Monday of the Gregorian calendar and a common year starting on Thursday of the Julian calendar. As of the start of 1601, the Gregorian calendar was 10 days ahead of the Julian calendar. This epoch is the beginning of the 400-year Gregorian leap-year cycle within which digital files first existed; the last year of any such cycle is the only leap year whose year number is divisible by 100.