Is this a thing, or is it made up?

A character that appeared in one episode of the show Bones mentioned that he suffers from, "A kind of chronological dyslexia that makes it difficult for [him] to accurately place discrete events on a linear time line". When I heard this, my first thought was (laughably enough) "Wow, what a cool learning disability!" Anyway I'm wondering if this is an actual phenomenon or if it's just made up by the show. It sounds real, but I couldn't find anything about it online and I've never heard of it before. Any info?