Firstly, the class you have above looks correct, there is no need to add an angle to it in case you were thinking of this.
Secondly, Create a converter class (inheriting from
IValueConverter
) that takes the time and returns the angle from the given number of seconds (Number of Seconds * 6). Include the converter's namespace in the XAML, then pass the converter into the binding:
{Binding {StaticResource {StaticResource updatableDateTime}, Converter={StaticResource YourConverterName}}
Here is an article about converters:
Value Converter in WPF[
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