_CalendarView.MonthShowEndTime Property
Office 2010
Returns or sets a Boolean (bool in C#) value that indicates whether end times for Outlook items are displayed in the CalendarView object. Read/write.
Assembly: Microsoft.Office.Interop.Outlook (in Microsoft.Office.Interop.Outlook.dll)
The value of this property is applicable only when the CalendarViewMode property of the CalendarView object is set to olCalendarViewMonth.