What century is the year 2000 part of?

Popular culture holds the year 2000 as the first year of the 21st century and the 3rd millennium, due to a tendency to group the years according to decimal values, as if year zero were counted. According to the Gregorian Calendar this distinction falls to the year 2001, because the 1st century was retroactively said to start with year AD 1. Since the calendar has no year zero, its first millennium spans from years 1 to 1000, inclusive, and its second millennium from years 1001 to 2000.

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• Think about it, when you count to ten what number do you start with? Do you EVER start Zero, One, Two, etc.? No you would start with One. It is the same for Calenders, year 1 comes first not year zero. It is the same for any Century you choose to talk about.

• Simple math answers this question. If you divide 2000 by 100 the result is 20 with a remainder of 0. Therefore 2000 is the last year of the 20th century.