DataGridTemplateColumn Class

<Grid>
    <Grid.Resources>
        <!--DataTemplate for Published Date column defined in Grid.Resources.  PublishDate is a property on the ItemsSource of type DateTime -->
        <DataTemplate x:Key="DateTemplate" >
            <StackPanel Width="20" Height="30">
                <Border Background="LightBlue" BorderBrush="Black" BorderThickness="1">
                    <TextBlock Text="{Binding PublishDate, StringFormat={}{0:MMM}}" FontSize="8" HorizontalAlignment="Center" />
                </Border>
                <Border Background="White" BorderBrush="Black" BorderThickness="1">
                    <TextBlock Text="{Binding PublishDate, StringFormat={}{0:yyyy}}" FontSize="8" FontWeight="Bold" HorizontalAlignment="Center" />
                </Border>
            </StackPanel>
        </DataTemplate>
        <!--DataTemplate for the Published Date column when in edit mode. -->
        <DataTemplate x:Key="EditingDateTemplate">
            <DatePicker SelectedDate="{Binding PublishDate}"  />
        </DataTemplate>
    </Grid.Resources>
    <DataGrid Name="DG1" ItemsSource="{Binding}" AutoGenerateColumns="False" >
        <DataGrid.Columns>
            <!--Custom column that shows the published date-->
            <DataGridTemplateColumn Header="Publish Date" CellTemplate="{StaticResource DateTemplate}" CellEditingTemplate="{StaticResource EditingDateTemplate}" />
        </DataGrid.Columns>
    </DataGrid>
</Grid>