Outlook 2007’s Calendar shows “Previous Appointment” and “Next Appointment” handles in the day, week, and month views when there are no appointments for the visible dates. These handles will help you find appointments on your calendar and you can’t turn them off, short of adding appointments to the one of the days in the view.

If you’ve never seen these handles, a screenshot is at http://www.xsolive.com/Outlook Screen shots/Forms/DispForm.aspx?ID=12