The majority of the events covered here are “Official Engagements”, or, events at which Kate is scheduled to attend on behalf of a charity. While public, royal family events such as Trooping the Colour, and certain church services do not technically fall in that category. For greater sorting ease, all events at which media are also present, is considered public.
More precise categories include “Annual Events”, such as Sandringham Christmas, St. Patrick’s Day at the Irish Guards, and “Special Events”, like the London Olympics or the Diamond Jubilee Celebrations.