calling a storyboard ( problem with calendar template)

hello

I am working on a WPF project in which it is necessary to customize controls.
I am working on Calendar control to add some simple animation. I added this :

<Storyboard  x:Key="Fade"><DoubleAnimation Storyboard.TargetProperty="Width" From="200" To="0" Duration="0:0:0.2" AutoReverse="True"/></Storyboard><Style TargetType="{x:Type Calendar}" ><Setter Property="Foreground" Value="#FF179EDC"/><Setter Property="Background"><Setter.Value><LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"><GradientStop Color="#FF179EDC" Offset="0"/><GradientStop Color="#FF179EDC" Offset="0.16"/><GradientStop Color="#FFFCFCFD" Offset="0.16"/><GradientStop Color="White" Offset="1"/></LinearGradientBrush></Setter.Value></Setter><Setter Property="BorderBrush"><Setter.Value><LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"><GradientStop Color="#FF179EDC" Offset="0"/></LinearGradientBrush></Setter.Value></Setter><Setter Property="BorderThickness" Value="3"/><Setter Property="Template"><Setter.Value><ControlTemplate TargetType="{x:Type Calendar}"><StackPanel x:Name="PART_Root" HorizontalAlignment="Center"><CalendarItem x:Name="PART_CalendarItem"
                                          BorderBrush="{TemplateBinding BorderBrush}" 
                                          BorderThickness="{TemplateBinding BorderThickness}"
                                          Background="{TemplateBinding Background}"
                                          Style="{TemplateBinding CalendarItemStyle}"/></StackPanel></ControlTemplate></Setter.Value></Setter></Style>

and in code behind:

        private void Calendar_DisplayModeChanged_1(object sender, CalendarModeChangedEventArgs e)
        {
            Storyboard mystory = (Storyboard)this.FindResource("Fade");
            mystory.Begin(Cal,Cal.Template);
        }

the problem is that this kind of style just work for an specific calendar which i called "cal" but I need to do it for every calendar in form (Including calendar inside other controls like date picker.)

I think if I call the storyboard right inside the style there will be no problem but the question is how?