OGDENSBURG, NEW JERSEY: The New Year arrives on schedule, even 150 feet underground. Here, partygoers at the Sterling Hill Zinc Mine enjoy a snack as they prepare to ring in the year 2000.

JEFF ZELEVANSKY/AP

TIME.com's Millennium Special
Into 2000: A TIME Photo Essay

Dawn of the Millennium: Part 1
Dawn of the Millennium: Part 2