The Calendar control allows you to set the start and end display dates. The DisplayDate property represents the current date to display; whereas, setting the DisplayDateStart and DisplayDateEnd properties limits you to select only the dates from the period ranging from the start date to the end date.
The following XAML code demonstrates how to set the DisplayDate, DisplayDateStart, and DisplayDateEnd properties in Calendar control:
<Calendar SelectionMode="MultipleRange" DisplayDateStart="8/10/2017" DisplayDateEnd="8/21/2017" DisplayDate="8/16/2017" />
Run the application now to see the following output: