Was January 1, 2000 the end of the millennium?

No, 12/31/99 was the end of the millennium. 1/1/00 was the beginning of the new millennium.

31st December 2000 was the end of the last millennium. There was never a year '0' and a millennium is 1000 years.

Look at it this way: We live in the 21st century although our years begin 20. Why? There was never a '0th' century. Same rules apply.

Nope

Yes it actually was, because since the year 2000 was a leap year, 3/4 of a day ahead of a tropical year (the actual year that makes sense according to the Earth's rotation around the sun), it so makes it that the actual year of 1999 end 3/4 of the first day of 2000, so yes, the previous millennia ended at the end of 1999 according to real-time, but according to the calendar that we go by, the previous millennia at about 5pm of January 1st 2000

Yes I do consider that to be the case but I know others who don't agree.

No. The previous millennium ended on December 31, 2000, and the current millennium began on January 1, 2001, and will end on December 31, 3000. There was no year zero. The first millennium began on January 1, 1, and ended on December 31, 1000. Extrapolate that and you have the beginning and ending dates of each millennium.

Beginning, moron

Nope

December 31 2000 was the last day of the millennium

Only you give a damn, no one else cares, so quit spamming this crap

Technically, (mathematically) December 31, 2000 was the end of the millennium.