Show time of day on sun trajectory line

It would be very useful to have a time of day display (perhaps a tick every hour) on the orange sun trajectory line. That way a single image would convey most of the needed information.

I made a mockup here: https://photos.google.com/photo/AF1QipNgKVTZLSSGLAW4Gv5DD792MMll-kajwokZAkiU