Recently Facebook has launched a new profile look and named it timeline because you can check yourself in different stages of time. You can show yourself from the birth of time to the present. You can present yourself in different instance of time.
If you are wondering how to activate Timeline for Facebook profile then, I will help you.
First go through this link. and then there you will find a buttom Get timeline if you have previously not installed timeline on your profile.
Click there and you will get timeline for your profile. You can edit your timeline and then publish it. If you do not publish then your timeline will not be visible.
After a week you click get timeline, your timeline will be published automatically. You can edit your timeline and click on publish to get timeline for your Facebook profile. Hope this works.
Facebook timeline is not a reverse process so activate once after you decide.