The site follows "the history of Medieval Britain from the time of Alfred the Great, through the Norman Conquest and up to the start of the Tudor Age. Detailed Timelines contain events for years between 800 and 1499AD. Maps show the locations of castles, abbeys and cathedrals in England, Scotland and Wales. Every person and building on this site has its own timeline and links to related subjects."
timeref.com also provides a "Today in History" link as well as a Timeline Wizard which generates specific timelines based on subjects and dates.