Thanks Didi,

It looks great and is incredibly easy to integrate into an existing scheduler without having to tinker much with the templates.

One small thing about the AddAppointmentButtonStyle.
IsVisible has no effect there, so the button can't be completely hidden.

My workaround for this is now...

<Style x:Key="SchedulerAgendaAddButtonStyle" TargetType="telerik:RadButton">
    <Setter Property="IsVisible" Value="False" /> <!--doesn't work-->
    <Setter Property="BackgroundColor" Value="Transparent" />
    <Setter Property="Text" Value="" />
</Style>