If you've been keeping it old school on Facebook with the previous generation single-column profile page, your days are officially numbered. Big Blue says it is preparing to move all 955 million of its users over to the newer Timeline-style profiles this fall.

Timeline, which organizes all of your wall posts and status updates into a continuous two-column stream dating back to the day you first joined Facebook, was first introduced late last year. Since then, many users have already been forced to make the switch, but some others have managed to fall through the cracks.

Before being moved to Timeline, users have a 7-day grace period where they can configure their new profile (and presumably clear out those beer bong photos from 2005) before it is published.

[via CNET]