By the way, this DataTemplate may work better for when you have thin strips such as that, to avoid label clipping.

<DataTemplate x:Key="VerticalInfoStripTemplate">
            <Grid Margin="0" Width="{Binding Width}" Height="{Binding Height}">
                <Rectangle Fill="{Binding Fill}" Opacity="1" />
                <Canvas HorizontalAlignment="Right" VerticalAlignment="Top">
                    <Grid Margin="0" Width="{Binding Height}" Height="{Binding Width}">
                        <Grid.RenderTransform>
                            <RotateTransform Angle="90" />
                        </Grid.RenderTransform>
                        <TextBlock 
                            VerticalAlignment="Center" 
                            HorizontalAlignment="Center" 
                            Foreground="DimGray" FontSize="30" 
                            FontWeight="Bold" Text="{Binding Label}" >
                    <ToolTipService.ToolTip>
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="25" />
                                <RowDefinition Height="25" />
                                <RowDefinition Height="25" />
                                <RowDefinition Height="25" />
                            </Grid.RowDefinitions>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="100" />
                                <ColumnDefinition Width="200" />
                            </Grid.ColumnDefinitions>
                            <TextBlock Text="Test0" Grid.Column="0" Grid.Row="0" />
                            <TextBlock Text="Tes0" Grid.Column="1" Grid.Row="0" />
                            
                            <TextBlock Text="Test1" Grid.Column="0" Grid.Row="1" />
                            <TextBlock Text="Test1" Grid.Column="1" Grid.Row="1" />
                            
                            <TextBlock Text="Test2" Grid.Column="0" Grid.Row="2" />
                            <TextBlock Text="Test2" Grid.Column="1" Grid.Row="2" />
                            
                            <TextBlock Text="Test3" Grid.Column="0" Grid.Row="3" />
                            <TextBlock Text="Test3" Grid.Column="1" Grid.Row="3" />
                        </Grid>
                    </ToolTipService.ToolTip>
                </TextBlock>
                    </Grid>
                </Canvas>
            </Grid>
        </DataTemplate>

Alternatively you could use the LayoutTransformer in the Silverlight Toolkit to apply layout transforms to the labels rather than render transfroms.
-Graham

Hi Graham,

It is working fine now.

Thanks

To use date ranges with that info strips sample, you need to set UseDates = true on the strips.

Hope this helps!

-Graham