Sorry for the stupid question. My work just switched to blackberrys and I am used to PDA type phones.

Is it possible (even with a 3rd party app) to change my home screen (the one with all the icons) to a calendar that will show all my upcoming appointments?

Thanks for the help!

Yes, sorta. You can get a different Theme. You want one that shows your calendar on the home page.

Also, some third-party apps do that, like BBToday.
3rd Party Application List - BlackBerryFAQ

Thanks a million for the quick help.

I'm downloading bbtoday right now!

Welcome. That may be perfect for what you want, it's free too. I think PocketDay will also give you a calendar/appointments on a home screen as well.