feat: finally.

src/Ursa/Controls/DateTimePicker/CalendarYearButtonEventArgs.cs

@@ -4,19 +4,13 @@ namespace Ursa.Controls;
 
 public class CalendarYearButtonEventArgs: RoutedEventArgs
 {
-    public int? Year { get; }
-    public int? Month { get; }
-    public int? StartYear { get; }
-    public int? EndYear { get; }
+    internal CalendarContext Context { get;  }
     internal CalendarViewMode Mode { get; }
 
     /// <inheritdoc />
-    internal CalendarYearButtonEventArgs(CalendarViewMode mode, int? year, int? month, int? startYear, int? endYear )
+    internal CalendarYearButtonEventArgs(CalendarViewMode mode, CalendarContext context)
     {
-        Year = year;
-        Month = month;
-        StartYear = startYear;
-        EndYear = endYear;
+        Context = context;
         Mode = mode;
     }
 }