Aren't there two strains of millennium fever?
Yes, there are two strains. The first is called type 0, and the second is type 1. Because there was no year 0 BC, the true millennium will not start until Jan 1, 2001. Most people who catch millennium fever will come down will type 0, because the illness is based on psychological factors rather than factual ones.

(Quoted from the Web page at: http://www.almosthome.nu/hiddentreasure/artic/millenum.html, to which I add a loud AMEN!)