After an apocalypse day (2000, 2012, ect) believing that the next apocalypse must happen soon because for some reason it didn't happen on the day everyone thought it would.
1999: DUDE! the worlds gonna end in 2000! all the equipment will fail and the nukes will launch and the planes will fall out of the sky!!!
2001: oh... well, DUDE! the worlds gonna end in 2012! The mayans said so.
2013: oh... well, DUDE! the worlds gonna end in 2016! Its the day of armegedan
2017: AHHH! now the worlds gonna end this month!
Feb: AHHH now its gonna end tomorrow...
...and so on and so forth