You can change the time increment along the left side and also select a custom range of dates by dragging across the date navigator in the upper right.
Located on the right side of the screen is the task list. You can set tasks for yourself as well as for others.
Schedule meetings and other events for a group of people all at once. The appointment shows up on all of the recipients calendars and if the appointment changes, it is automatically updated on everyone else's calendar as well.
This is a very powerful feature.
Print out your agenda for the day, week, or month (or any date range).