WPF: Calendar.DisplayDate Dependency Property

Please see the attached example, there is a Calendar and a Button.

        <Calendar SelectedDate="{Binding DateTimeTest, Mode=TwoWay}"

                  DisplayDate="{Binding DateTimeTest, Mode=OneWay}" />

        <Button Command="{Binding TodayCommand}"

                Content="Today" />

The Button set the property DateTimeTest to DateTime.Today.

The workflow of the issue:

1. Select the date 19. 3. 2010 via Calendar via selecting year from the top part (important).
2. Press Today Button.
3. The selected date of Calendar is not updated.

.NET Framework 4.7.1

_This issue has been moved from https://developercommunity.visualstudio.com/content/problem/498724/wpf-calendardisplaydate-dependency-property.html
VSTS ticketId: 823387_
_These are the original issue comments:_
(no comments)
_These are the original issue solutions:_
(no solutions)