OLD CALENDAR XAML:

xaml = <StackPanel 
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  <toolkit:Calendar xmlns:toolkit="clr-namespace:Microsoft.Windows.Controls;assembly=WPFToolkit" 
   Name="Calendar" 
   Margin ="0,-3,0,-2">
  </toolkit:Calendar>
</StackPanel>