diff --git a/CampusAppWP8/CampusAppWP8/Pages/TimeTable/TimeTableDay.xaml b/CampusAppWP8/CampusAppWP8/Pages/TimeTable/TimeTableDay.xaml
index 4b8a3da3..2462168c 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/TimeTable/TimeTableDay.xaml
+++ b/CampusAppWP8/CampusAppWP8/Pages/TimeTable/TimeTableDay.xaml
@@ -19,7 +19,9 @@
         <phone:Pivot x:Name="ThePivot" Title="{Binding Path=LocalizedResources.TimeTableApp_Title, Source={StaticResource LocalizedStrings}}">
             <phone:Pivot.HeaderTemplate>
                 <DataTemplate>
-                    <TextBlock Text="{Binding Path=Day, Mode=OneWay, StringFormat='ddd dd.MM.yy'}"/>
+                    <Border BorderThickness="0" Width="440">
+                        <TextBlock Text="{Binding Path=Day, Mode=OneWay, StringFormat='ddd dd.MM.yy'}"/>
+                    </Border>
                 </DataTemplate>
             </phone:Pivot.HeaderTemplate>
             <phone:Pivot.ItemTemplate>
diff --git a/CampusAppWP8/CampusAppWP8/Utility/Converter/DoubleNaNConverter.cs b/CampusAppWP8/CampusAppWP8/Utility/Converter/DoubleNaNConverter.cs
new file mode 100644
index 00000000..b95d2ccc
--- /dev/null
+++ b/CampusAppWP8/CampusAppWP8/Utility/Converter/DoubleNaNConverter.cs
@@ -0,0 +1,41 @@
+//-----------------------------------------------------------------------
+// <copyright file="DoubleNaNConverter.cs" company="BTU/IIT">
+// The MIT License (MIT). Copyright (c) 2013 BTU/IIT.
+// </copyright>
+// <author>Fiedler</author>
+// <date>22.11.2013</date>
+// <summary>Implements the double na n converter class</summary>
+//-----------------------------------------------------------------------
+namespace CampusAppWP8.Utility.Converter
+{
+    using System;
+    using System.Windows;
+    using System.Windows.Data;
+
+    /// <summary> A double na n converter. </summary>
+    /// <remarks> Fiedler, 22.11.2013. </remarks>
+    /// <seealso cref="T:System.Windows.Data.IValueConverter"/>
+    public sealed class DoubleNaNConverter : IValueConverter
+    {
+        /// <summary>
+        ///     Ändert die Quelldaten vor der Übergabe an das Ziel zur Anzeige in der Benutzeroberfläche.
+        /// </summary>
+        /// <remarks> Fiedler, 22.11.2013. </remarks>
+        /// <seealso cref="M:System.Windows.Data.IValueConverter.Convert(object,Type,object,System.Globalization.CultureInfo)"/>
+        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo language)
+        {
+            return (value is double && value.Equals(double.NaN) == false) ? value : 0.0;
+        }
+
+        /// <summary>
+        ///     Ändert die Zieldaten vor der Übergabe an das Quellobjekt.  Diese Methode wird nur in
+        ///     <see cref="F:System.Windows.Data.BindingMode.TwoWay" />-Bindungen aufgerufen.
+        /// </summary>
+        /// <remarks> Fiedler, 22.11.2013. </remarks>
+        /// <seealso cref="M:System.Windows.Data.IValueConverter.ConvertBack(object,Type,object,System.Globalization.CultureInfo)"/>
+        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo language)
+        {
+            return (value is double && value.Equals(double.NaN) == false) ? value : 0.0;
+        }
+    }
+}