title: Nullable value in a WindowsRT DatePicker (8.1)
body: <p>I can't seem to get anything working with a simple XAML project that has the DatePicker accepting a nullable value and therefore the Date/Month/Year boxes are showing this text as placeholder.</p>
  
  <p>Can anyone help? I've found very little from other people on the web about this!</p>
  
  <p>thank you</p>