Let me go straight to your issue.
is designed to handle users` date-time input. The text which you see when you type inside the control, is controlled by the Mask
property. On the other hand, the text which you see when the focus is lost is controlled by the FormatString
property. By setting different values to these properties your issue can be solved. Keep in mind that your data display format depends on your region and language settings.
Please take a look at the attached project and see if it works for you.
Pavel R. Pavlov
the Telerik team