First I want to thank you for reporting the issue with 12:00 AM default time being selected when StartTime
shouldn't allow it. We have logged it in our Public Issue Tracker System
where you can track its status and vote for it.
In order to change the default time of the DateTimePicker control you can use the SelectionChanged
event and set the SelectedTime
property to the value you desire. I have prepared and attached a sample project representing the described approach, give it a try.
the Telerik team