CalendarView.DayEndHour
From Jeremie Leroy - XOJO Controls Wiki
Property (As Single)
If this property is different than 0.0, the remaining hours from DayEndHour to midnight will be darkened. The default value is 18.0
Example
This example sets the DayEndHour to 18:45. <rbcode> me.DayEndHour=18.75 </rbcode>