There are many theories, pink one. One such theory is that the rupture did happen, the apocalypse is just slower than we imagined. Another is that "Bob" wrote the year upside down on the napkin, it is actually in 8661. Another is that it simply isn't 1998 yet, and The Conspiracy has been fucking with the calendar for a long time. There is some evidence to substantiate all of these, so they all may as well be true.