Describe the bug
Set DateTimePicker's SelectedDateTime, and open the select dialog, the dialog display error datetime.

To Reproduce
Steps to reproduce the behavior:

1. Create a xaml <hc:DateTimePicker x:Name="dt"/>
2. Add code behind dt.SelectedDateTime = new DateTime(2021, 3, 20, 14, 35, 59);

Expected behavior
Show the datetime given in code behind.

Screenshots

Environment (please complete the following information):

• .net: core 3.1
• IDE vs 2019 latest
• HC Version 3.2.0

Additional context
Add any other context about the problem here.