Remember this post: Time That was written in 2006. In it, I described my ability to visualize time. Recently however, I've been able to place that ability into some perspective. In 2009, some researchers in Scotland have been able to test for this ability and label it as a form of Synaesthesia. Roughly defined, its is a neurological condition in which regions of the brain may have a hyper connectivity resulting in multiple senses intertwined and mixed. Almost 54 types of these conditions have been noted and researched.
But we're here to talk about time. This article: The Cognitive Benefits of Time-Space Synaesthesia summarizes the research and also makes some connections to other visualization abilities which I have including internal mapping and the ability to visualize two dimensional drawings in three dimensional space.
Like the subject of the article, I visualize my location within a frame of reference. If I'm thinking of Sunday then across the divide is Wednesday/Thursday. I do have a heightened ability to remember events in my life and have significant recall of very specific items within that event, however I am not hyperthymestic. I cannot have total recall of everything which occured on a particular day. I remember enough as it is. Further information clogging up the bandwidth would be too much.