Methods
Templated Picker for Xamarin allows you to clear the selected date/time through its ClearSelection method
Example
<StackLayout>
<Button Clicked="OnClearSelectionClicked" Text="clear selection"/>
<telerikInput:RadTemplatedPicker x:Name="picker">
<telerikInput:RadTemplatedPicker.SelectorTemplate>
<ControlTemplate>
<telerikInput:RadCalendar SelectedDate="{TemplateBinding SelectedValue, Mode=TwoWay}"/>
</ControlTemplate>
</telerikInput:RadTemplatedPicker.SelectorTemplate>
</telerikInput:RadTemplatedPicker>
</StackLayout>
and we can clear the selection inside the button click event:
private void OnClearSelectionClicked(object sender, EventArgs e)
{
this.picker.ClearSelection();
}
also you will need to add the following namespace:
xmlns:telerikInput="clr-namespace:Telerik.XamarinForms.Input;assembly=Telerik.XamarinForms.Input"