I have been thinking about this quite a lot so I wanted to make a suggestion, I utilise the Calendar application on a daily basis and I absolutely love it. I particularly love the new sticker option, I already use various stickers quite often throughout the year!
I think it would be so useful to be able to add times to the stickers, it would enable you to see important things like appointments at a glance with the option to be a bit more in depth with it without adding a separate event. I know I would love it, I'm sure many others would too.
I sent this as a suggestion this morning and although Samsung loved the idea, they recommended I post on here to get as many people on board as possible, as it may help it come to fruition!