Index: Application/Application.Ringtoets/App.xaml.cs
===================================================================
diff -u -re3fe000640536463811a1051aedf6da711ee0f56 -ra5e7f5cca253bd8c38f75d3830c55fbfc9cc4bb6
--- Application/Application.Ringtoets/App.xaml.cs	(.../App.xaml.cs)	(revision e3fe000640536463811a1051aedf6da711ee0f56)
+++ Application/Application.Ringtoets/App.xaml.cs	(.../App.xaml.cs)	(revision a5e7f5cca253bd8c38f75d3830c55fbfc9cc4bb6)
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Configuration;
 using System.Diagnostics;
+using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Reflection;
@@ -14,7 +15,6 @@
 using Core.Common.Controls.Swf;
 using Core.Common.Gui;
 using Core.Common.Gui.Forms.MainWindow;
-using Core.Common.Utils.Globalization;
 using Core.Plugins.CommonTools;
 using Core.Plugins.CommonTools.Gui;
 using Core.Plugins.ProjectExplorer;
@@ -55,7 +55,7 @@
 
         static App()
         {
-            SetLanguageAndRegionalSettings();
+            SetLanguage();
 
             log.Info(Core.Common.Gui.Properties.Resources.App_App_Starting_Ringtoets);
         }
@@ -364,12 +364,26 @@
             }
         }
 
-        private static void SetLanguageAndRegionalSettings()
+        private static void SetLanguage()
         {
             var language = ConfigurationManager.AppSettings["language"];
             if (language != null)
             {
-                RegionalSettingsManager.Language = language;
+                var localMachineDateTimeFormat = (DateTimeFormatInfo) Thread.CurrentThread.CurrentCulture.DateTimeFormat.Clone();
+                localMachineDateTimeFormat.DayNames = CultureInfo.InvariantCulture.DateTimeFormat.DayNames;
+                localMachineDateTimeFormat.MonthNames = CultureInfo.InvariantCulture.DateTimeFormat.MonthNames;
+                localMachineDateTimeFormat.AbbreviatedDayNames = CultureInfo.InvariantCulture.DateTimeFormat.AbbreviatedDayNames;
+                localMachineDateTimeFormat.AbbreviatedMonthGenitiveNames = CultureInfo.InvariantCulture.DateTimeFormat.AbbreviatedMonthGenitiveNames;
+                localMachineDateTimeFormat.AbbreviatedMonthNames = CultureInfo.InvariantCulture.DateTimeFormat.AbbreviatedMonthNames;
+
+                var cultureInfo = new CultureInfo(language)
+                {
+                    NumberFormat = Thread.CurrentThread.CurrentCulture.NumberFormat,
+                    DateTimeFormat = localMachineDateTimeFormat
+                };
+
+                Thread.CurrentThread.CurrentUICulture = cultureInfo;
+                Thread.CurrentThread.CurrentCulture = cultureInfo;
             }
         }
     }
Index: Core/Common/src/Core.Common.Utils/Globalization/RegionalSettingsManager.cs
===================================================================
diff -u -ra950714ad9510756331d862aa35695fa0b2ed03b -ra5e7f5cca253bd8c38f75d3830c55fbfc9cc4bb6
--- Core/Common/src/Core.Common.Utils/Globalization/RegionalSettingsManager.cs	(.../RegionalSettingsManager.cs)	(revision a950714ad9510756331d862aa35695fa0b2ed03b)
+++ Core/Common/src/Core.Common.Utils/Globalization/RegionalSettingsManager.cs	(.../RegionalSettingsManager.cs)	(revision a5e7f5cca253bd8c38f75d3830c55fbfc9cc4bb6)
@@ -12,40 +12,11 @@
     /// </summary>
     public static class RegionalSettingsManager
     {
-        public static event Action LanguageChanged;
         public static event Action FormatChanged;
         private static readonly CustomFormatProvider customFormatProvider = new CustomFormatProvider();
 
         private static string realNumberFormat = "G5";
 
-        /// <summary>
-        /// Language in the form of standard cultures "en-US", "ru-RU" ...
-        /// </summary>
-        public static string Language
-        {
-            set
-            {
-                var ci = new CultureInfo(value)
-                {
-                    NumberFormat = Thread.CurrentThread.CurrentCulture.NumberFormat,
-                    DateTimeFormat = CreateDateTimeFormatFromSystemSettingsWithoutNameLocalization(),
-                };
-
-                Thread.CurrentThread.CurrentUICulture = ci;
-                Thread.CurrentThread.CurrentCulture = ci;
-
-                if (LanguageChanged != null)
-                {
-                    LanguageChanged();
-                }
-            }
-
-            get
-            {
-                return Thread.CurrentThread.CurrentCulture.Name;
-            }
-        }
-
         public static CultureInfo CurrentCulture
         {
             get
Index: Core/Common/test/Core.Common.Utils.Test/Globalization/RegionalSettingsManagerTest.cs
===================================================================
diff -u -r41c77f9f36ae74a406fd382187426cc06d2b0200 -ra5e7f5cca253bd8c38f75d3830c55fbfc9cc4bb6
--- Core/Common/test/Core.Common.Utils.Test/Globalization/RegionalSettingsManagerTest.cs	(.../RegionalSettingsManagerTest.cs)	(revision 41c77f9f36ae74a406fd382187426cc06d2b0200)
+++ Core/Common/test/Core.Common.Utils.Test/Globalization/RegionalSettingsManagerTest.cs	(.../RegionalSettingsManagerTest.cs)	(revision a5e7f5cca253bd8c38f75d3830c55fbfc9cc4bb6)
@@ -10,20 +10,6 @@
     public class RegionalSettingsManagerTest
     {
         [Test]
-        public void ChangeLanguage()
-        {
-            var languageChangedCallCount = 0;
-
-            RegionalSettingsManager.LanguageChanged += delegate { languageChangedCallCount++; };
-
-            RegionalSettingsManager.Language = "ru-RU";
-
-            Assert.AreEqual(1, languageChangedCallCount, "event is fired when language is changed");
-
-            Assert.AreEqual("ru-RU", RegionalSettingsManager.Language);
-        }
-
-        [Test]
         public void SetRealNumberFormat()
         {
             var formatChangedCallCount = 0;