datepicker issue- calendar size is too big - wpf

Question

The following xaml date picker (dropdown) calender and its days width is too big. how to reduce width of calender and days of calender.
Please help me to solve this issue
<Grid Grid.Column="0">
<Grid.ColumnDefinitions >
<ColumnDefinition Width="134"/>
<ColumnDefinition Width="1*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions >
<RowDefinition />
<RowDefinition />
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<TextBlock Text="Client Name" Grid.Row="0" Grid.Column="0"/>
<TextBox Text="{Binding DataContext.client_name, ElementName=Parant}"
MaxLength="50"
Padding="2"
Height="25"
Grid.Row="0" Grid.Column="1"/>
<TextBlock Text="Building Location" Grid.Row="1" Grid.Column="0"/>
<TextBox MaxLength="255"
Text="{Binding DataContext.location, ElementName=Parant}"
Grid.Row="1"
AcceptsReturn="True"
TextWrapping="Wrap"
Height="40"
Grid.Column="1" />
<TextBlock Text="Date" Grid.Row="2" Grid.Column="0"/>
<!--<TextBox MaxLength="255"
Text="{Binding DataContext.survey_date, ElementName=Parant}"
Grid.Row="2" Grid.Column="1"/>-->
<DatePicker Name="DtpFromDate"
SelectedDate="{Binding DataContext.SurvayDatetime , ElementName=Parant}"
Margin="5"
Width="230"
HorizontalAlignment="Left"
Height="25" Grid.Row="2" Grid.Column="1" />
<!--<TextBlock Text="Edit Lock:" Grid.Row="3" Grid.Column="0"/>
<ComboBox ItemsSource= "{Binding DataContext.elockList, ElementName=Parant}"
SelectedValue="{Binding DataContext.elock, ElementName=Parant}"
Grid.Row="3" Grid.Column="1" />-->
<TextBlock Text="Turn Around Time" Grid.Row="3" Grid.Column="0"/>
<ComboBox ItemsSource="{Binding DataContext.turnaroundList, ElementName=Parant}"
SelectedValue ="{Binding DataContext.turnaround, ElementName=Parant}"
Height ="25"
Grid.Row="3"
Grid.Column="1"/>
please see the picture of calender, and give solution for solve this issue.
My date picker is shown like:

Answer 1

after adding calender custom style the problem solved