Thank you for writing.
In order to synchronize RadCalendar with the RadScheduler, you have to subscribe to the SelectedValueChanged event of the RadCalendar. In this event you can apply the selected value to the StartDate of the ActiveView in the RadScheduler.
sender, EventArgs e)
.radCalendar1.SelectedDates.Count > 0)
In case that you have other questions, feel free to write us back.
All the best,
the Telerik team