Written by Otto de Voogd.
Since there was never a year 0, the year 2000 was the last (i.e. 1000th) year of the 2nd millennium. The 3rd millennium therefore started on January 1st, 2001 and not as is popularly believed on January 1st, 2000. The millennium clock by default takes the year 3001 as start of the 4th millennium.
This millennium clock used to countdown to the start of the 3rd millennium. But since we are now in the new millennium, the countdown must restart! So this is a countdown that you will never see finish. Sorry!
This millennium countdown clock is now deprecated. It has long been superseded by the much more general countdown clock generator that lets you countdown to a date you choose, and uses more modern techniques to render a better countdown clock.
This millennium clock is being kept online merely as a record of how the original countdown clock worked.