Facebook Timeline is a social media feature introduced by Facebook in September 2011 and rolled out to all users in February 2012. Timeline combines a user's Facebook Wall and Profile into one page, creating a more visually holistic profile. It includes reverse-chronological details, by year, of a user's Facebook history with key life points, including birthdays, weddings and other major events.
Timeline reorganizes all stored user information for display, rather than archival. In previous Facebook incarnations, it was more difficult or impossible to view outdated events, photos and comments.