On my old Samsung Galaxy Ace 2 S-Planner you could highlight whole days, I had 3 colours, one for me, one for the wife, and one for when we were both involved so it was simple to see which one of us (or both) was busy that day. On my S3 the 'highlights' are now just emotions and seem to block some of the event information. I have used the tick, pin and X already for other meanings.

I guess there is no way to use the old colours in S-Planner on the S3 but in case there was thought I'd post here! Just in case......