set { SetValue(DayProperty, value); OnPropertyChanged(nameof(FormattedString)); }
set => SetValue(DayProperty, value);
get => (DateTime)GetValue(DayProperty); set => SetValue(DayProperty, value);
set { SetValue(DayProperty, value); OnPropertyChanged(nameof(FormattedString)); }
set => SetValue(DayProperty, value);
get => (DateTime)GetValue(DayProperty); set => SetValue(DayProperty, value);