You need a today theme. You should have some under your options>theme on the phone. Choose one and test it, you can always download others that suit you better if you wind up liking it.
You should not have to do anything once the theme is set, just make sure there are no all day appointments and also you can check the options>adv options>default services>calendar - choose the email/calendar you want - save
Other sites I like are Pimpmyberry.com, themes4bb.com - once you see a today or today+ theme just look at the screens, it will show you what you will get.. some themers will make them with just messages or just calendar or a mix or both. It will make more sense once you get to looking around.... I dont use the themes personally but I see many - its all theme dependent..
Good luck
Take a look at these two themes - you will see in the screenshots they are a bit different (just an example)