Berkshire 2012 Calendar. This popular A4 format Berkshire 2012 Calendar features many famous buildings and landscapes from around the county of Berkshire which lies to the west of London in the Thames valley. Berkshire is amongst the oldest counties in England and dates from 840. It is believed to have gotten its name from a large forest of box trees that was called Bearroc. Windsor Castle is situated in Berkshire and hence the references to the term Royal County of Berkshire. This fantastic 2012 calendar features 12 stunning images capturing the visual delights of The Royal County of Berkshire.