Time Development Project

When we are sleeping with headphones on that project music or sounds sometimes while lucid we can hear the sounds in our dreams. I thought of something, what if we developed an application that told you the time while you were dreaming. For example, you're dreaming and enjoying your lucidity when all of a sudden you hear the time being told to you "4:05 AM". It would repeat every couple of minutes so you aren't completely distracted by it. Why have this, it would help people time their dreams and truly see how long they are. This is just a theory, it's never been tested so who knows if it would even work.

Yay or nay?