<sg:CalendarDayButtonStyleSelector x:Key="StyleSelector">
<sg:CalendarDayButtonStyleSelector.Conditions>
<sg:DayOfWeekCondition DayOfWeek="Wednesday">
<sg:DayOfWeekCondition.Setters>
<sg:SelectorSetter Property="FontSize" Value="20"/>
</sg:DayOfWeekCondition.Setters>
</sg:DayOfWeekCondition>
<sg:PropertyCondition Property="IsHoliday" Value="true">
<sg:PropertyCondition.Setters>
<sg:SelectorSetter Property="Foreground" Value="Red"/>
</sg:PropertyCondition.Setters>
</sg:PropertyCondition>
</sg:CalendarDayButtonStyleSelector.Conditions>
</sg:CalendarDayButtonStyleSelector>
<Style TargetType="sg:DropDownCalendarEditElement">
<Setter Property="HolidaySetting">
<Setter.Value>
<sg:HolidaySetting IsActive="True">
<sg:DayOfWeekHoliday DayOfWeek="Wednesday" Month="All" WeekInMonth="All" />
</sg:HolidaySetting>
</Setter.Value>
</Setter>
<Setter Property="CalendarDayButtonStyleSelector">
<Setter.Value>
<StaticResource ResourceKey="StyleSelector"/>
</Setter.Value>
</Setter>
</Style>