Simplify the following text for a Grade 6 native English-speaking person.
Original: Year 1600 ( MDC ) was a leap year starting on Saturday ( link will display the full calendar ) and a century leap year of the Gregorian calendar and a leap year starting on Tuesday of the 10-day slower Julian calendar .
Simplified: 1600 was a leap year starting on Saturday , in accordance with the Gregorian calendar . It was the last year of the 16th century .