Calendar View in Project 98

When I go into the Calendar view within Proj98 instead of activities falling nicely into one day they seem to start half way through the day and progress into the next. For instance, an activity starting on 1/11/01 and running for 1 day will, on the calendar, be displayed as starting half way through the 1/11/01 and completing half way through the 2/11/01. How do I get it to start and finish within the 1/11/01.

Thanks