Facebook introduced the new timeline feature in September, 2011. Many people love it. Some don’t.

According to Facebook Center,
You will not be able to switch back to the old design after upgrading to Timeline

However, if you hate the timeline so much, you can still switch back to the old facebook!

Download and install the following browser extension:

http://www.timelineremove.com/ [available for Chrome, Firefox, IE]

NOTE: You can disable the Timeline only for yourself but your friends will still see the Timeline style unless they install this addon!

P.S: Personally, I love Facebook timeline.