The program interface recalls typical school agendas: there's a series of columns representing the days of the week, and rows representing each hour of the day. You can enter information into those rows, for appointments, commitments, events, and other reminders.
The program also includes an option that will alert you a few days ahead of time when you have an important event coming up. This really comes in handy for things like birthdays, since it gives you time to track down cards and presents if you need to.
Day Organizer is a useful tool for anyone with a busy schedule who doesn't want to miss anything. And, the fact that you can export your calendar in RPT, PDF, XLS, DOC, or RTF format means that you can bring it with you wherever you go.