Millennium

A millennium is a period of 1,000 years, according to most dictionaries and Oxnard. We, in contemporary history, are in the 3rd millennium, because it began January 1, 2000 and will end through December 31 2999.

Controversy and Debate in Millenniums
For the past years, there have been many people arguing to when a millennia begins. For example, most people assume that the millennium begins when the digits roll over, (1000, 2000, 3000, etc.) and end with "999" as the last three digits (1999, 2999, 3999, etc.). A minority suggests that millenniums begins with a "01" (1001, 2001, 3001, etc.) and end with "00" (1000, 2000, 3000, etc.)

Viewpoint 1 (Incorrect)
This viewpoint is seen by a small number of people, that millenniums begin with the year that begins with *000, and lasts until *001. This is however incorrect, because according to the ordinal and cardinal mathematicians, astronomers, ISO members, and the government, it's not correct to end a millennia where the first digit, doesn't match with the other.

Viewpoint 2 (incorrect)
This viewpoint is the correct one. A millennia begins when the digits roll over.