When the user navigates between the views, the DatePicker currently fires a ViewChanged event. This event provides the new view (Decade, Month etc.) but there is no way to detect the selection that the user made in the previous view.
For example, if am in the Decate view, as soon as I select a year, the DatePicker will switch to Month view. The problem that I am facing is that I cannot get the year selected from the Decade view. I need that, so I can display it in my custom HeaderTemplate.