Maybe an other option: use black/white icons (date number in orange) when it's set for another day and full coulour (orange, like it is now) when event is today. (guess somebody has to convert the coulour version and put them in install pack?)

Now it doesn't draw my attention enough, if I have seen an appointment for 5days or so, I automatically avoid it.. But let's see what others think.. you don't have to build an app for me