Records lasts all day in MAQ calender

MAQSupport I have a calender visual to display the class room schedule. The columns are :

Start date with time

End date with time

Room numbers

Courses etc.

The date range is usually between  9AM- 8PM in any given day but the chart is showing all the classes all day along.

 How to configure the data when using the Calendar, so that the classes range displays properly? Thank you.