Billennium

Billennium may refer to:


 * 2nd millennium, the second period of one thousand years in the Common Era
 * 3rd millennium, the period of time which began with the year 2001
 * Beretta 92 Billennium, a type of pistol
 * Unix billennium, a point in Unix time which occurred in 2001
 * "Billennium" (short story), a short story by J. G. Ballard