It shows: The time of day
This is what you see: I showed how it looks to me if I were to think about the hours in a day. I also added the color I see for those particulary hours ( I don't see color for all of them).
This is what I could not show better and what is missing: I see my time of day depending on what time it is when I'm thinking about it. I view it from a different perspective from different hours if that makes sense. Since it changes I am not able to draw that so I just did what it would look like if I looked at it as a whole. Also, there is no gap between 7:00 as in the picture. To me they are joined.