diff --git a/src/BreCalClient/EditShipcallControl.xaml.cs b/src/BreCalClient/EditShipcallControl.xaml.cs
index 322b534..65ae975 100644
--- a/src/BreCalClient/EditShipcallControl.xaml.cs
+++ b/src/BreCalClient/EditShipcallControl.xaml.cs
@@ -205,15 +205,23 @@ namespace BreCalClient
                     case ShipcallType.Departure:
                         isEnabled &= this.comboBoxDepartureBerth.SelectedItem != null;
                         isEnabled &= this.datePickerETD.Value.HasValue;
+                        if(this.datePickerETD.Value.HasValue)
+                            isEnabled &= (this.datePickerETD.Value.Value > DateTime.Now);
                         break;                        
                     case ShipcallType.Arrival:
                         isEnabled &= this.comboBoxArrivalBerth.SelectedItem != null;
                         isEnabled &= this.datePickerETA.Value.HasValue;
+                        if(this.datePickerETA.Value.HasValue)
+                            isEnabled &= (this.datePickerETA.Value.Value > DateTime.Now);
                         break;
                     case ShipcallType.Shifting:
                         isEnabled &= ((this.comboBoxDepartureBerth.SelectedItem != null) && (this.comboBoxArrivalBerth.SelectedItem != null));
                         isEnabled &= this.datePickerETD.Value.HasValue;
                         isEnabled &= this.datePickerETA.Value.HasValue;
+                        if (this.datePickerETD.Value.HasValue)
+                            isEnabled &= (this.datePickerETD.Value.Value > DateTime.Now);
+                        if (this.datePickerETA.Value.HasValue)
+                            isEnabled &= (this.datePickerETA.Value.Value > DateTime.Now);
                         break;
                 }
             }
diff --git a/src/BreCalClient/EditTimesAgencyIncomingControl.xaml.cs b/src/BreCalClient/EditTimesAgencyIncomingControl.xaml.cs
index 8a38a07..e7c2bb7 100644
--- a/src/BreCalClient/EditTimesAgencyIncomingControl.xaml.cs
+++ b/src/BreCalClient/EditTimesAgencyIncomingControl.xaml.cs
@@ -4,6 +4,7 @@
 
 using BreCalClient.misc.Model;
 using System;
+using System.Runtime.Serialization;
 using System.Windows;
 using static BreCalClient.Extensions;
 
@@ -70,9 +71,16 @@ namespace BreCalClient
 
         private void buttonOK_Click(object sender, RoutedEventArgs e)
         {
-            this.CopyToModel();
-            this.DialogResult = true;
-            this.Close();
+            if (!CheckValues(out string message))
+            {
+                MessageBox.Show(message, "Warning", MessageBoxButton.OK, MessageBoxImage.Warning);
+            }
+            else
+            {
+                this.CopyToModel();
+                this.DialogResult = true;
+                this.Close();
+            }
         }
 
         private void buttonCancel_Click(object sender, RoutedEventArgs e)
@@ -85,6 +93,49 @@ namespace BreCalClient
 
         #region private methods
 
+        private bool CheckValues(out string message)
+        {            
+            message = "";
+
+            if (this.datePickerETA.Value.HasValue && (this.datePickerETA.Value.Value < DateTime.Now) && (this.datePickerETA_End.Value == null))
+            {                
+                message = BreCalClient.Resources.Resources.textETAInThePast;
+                return false;
+            }
+
+            if(this.datePickerETA_End.Value.HasValue && this.datePickerETA_End.Value < DateTime.Now)
+            {                
+                message = BreCalClient.Resources.Resources.textETDInThePast;
+                return false;
+            }
+
+            if(this.datePickerETA.Value.HasValue && this.datePickerETA_End.Value.HasValue && this.datePickerETA.Value > this.datePickerETA_End.Value)
+            {
+                message = BreCalClient.Resources.Resources.textEndValueBeforeStartValue;
+                return false;
+            }
+
+            if (this.datePickerTidalWindowFrom.Value.HasValue && (this.datePickerTidalWindowFrom.Value.Value < DateTime.Now) && (this.datePickerTidalWindowTo.Value == null))
+            {
+                message = BreCalClient.Resources.Resources.textTideTimesInThePast;
+                return false;
+            }
+
+            if (this.datePickerTidalWindowTo.Value.HasValue && this.datePickerTidalWindowTo.Value < DateTime.Now)
+            {
+                message = BreCalClient.Resources.Resources.textTideTimesInThePast;
+                return false;
+            }
+
+            if (this.datePickerTidalWindowFrom.Value.HasValue && this.datePickerTidalWindowTo.Value.HasValue && this.datePickerTidalWindowFrom.Value > this.datePickerTidalWindowTo.Value)
+            {
+                message = BreCalClient.Resources.Resources.textEndValueBeforeStartValue;
+                return false;
+            }
+
+            return true;
+        }
+
         private void CopyToModel()
         {
             if (this.ShipcallModel.Shipcall != null)
diff --git a/src/BreCalClient/EditTimesAgencyOutgoingControl.xaml.cs b/src/BreCalClient/EditTimesAgencyOutgoingControl.xaml.cs
index 0a778fd..17dc94b 100644
--- a/src/BreCalClient/EditTimesAgencyOutgoingControl.xaml.cs
+++ b/src/BreCalClient/EditTimesAgencyOutgoingControl.xaml.cs
@@ -80,9 +80,16 @@ namespace BreCalClient
 
         private void buttonOK_Click(object sender, RoutedEventArgs e)
         {
-            this.CopyToModel();
-            this.DialogResult = true;
-            this.Close();
+            if (!CheckValues(out string message))
+            {
+                System.Windows.MessageBox.Show(message, "Warning", MessageBoxButton.OK, MessageBoxImage.Warning);
+            }
+            else
+            {
+                this.CopyToModel();
+                this.DialogResult = true;
+                this.Close();
+            }
         }
 
         private void buttonCancel_Click(object sender, RoutedEventArgs e)
@@ -95,6 +102,50 @@ namespace BreCalClient
 
         #region private methods
 
+
+        private bool CheckValues(out string message)
+        {
+            message = "";
+
+            if (this.datePickerETD.Value.HasValue && (this.datePickerETD.Value.Value < DateTime.Now) && (this.datePickerETD_End.Value == null))
+            {
+                message = BreCalClient.Resources.Resources.textETAInThePast;
+                return false;
+            }
+
+            if (this.datePickerETD_End.Value.HasValue && this.datePickerETD_End.Value < DateTime.Now)
+            {
+                message = BreCalClient.Resources.Resources.textETDInThePast;
+                return false;
+            }
+
+            if (this.datePickerETD.Value.HasValue && this.datePickerETD_End.Value.HasValue && this.datePickerETD.Value > this.datePickerETD_End.Value)
+            {
+                message = BreCalClient.Resources.Resources.textEndValueBeforeStartValue;
+                return false;
+            }
+
+            if (this.datePickerTidalWindowFrom.Value.HasValue && (this.datePickerTidalWindowFrom.Value.Value < DateTime.Now) && (this.datePickerTidalWindowTo.Value == null))
+            {
+                message = BreCalClient.Resources.Resources.textTideTimesInThePast;
+                return false;
+            }
+
+            if (this.datePickerTidalWindowTo.Value.HasValue && this.datePickerTidalWindowTo.Value < DateTime.Now)
+            {
+                message = BreCalClient.Resources.Resources.textTideTimesInThePast;
+                return false;
+            }
+
+            if (this.datePickerTidalWindowFrom.Value.HasValue && this.datePickerTidalWindowTo.Value.HasValue && this.datePickerTidalWindowFrom.Value > this.datePickerTidalWindowTo.Value)
+            {
+                message = BreCalClient.Resources.Resources.textEndValueBeforeStartValue;
+                return false;
+            }
+
+            return true;
+        }
+
         private void CopyToModel()
         {
             if (this.ShipcallModel.Shipcall != null)
diff --git a/src/BreCalClient/EditTimesAgencyShiftingControl.xaml.cs b/src/BreCalClient/EditTimesAgencyShiftingControl.xaml.cs
index 5fa79ad..f0cf0e9 100644
--- a/src/BreCalClient/EditTimesAgencyShiftingControl.xaml.cs
+++ b/src/BreCalClient/EditTimesAgencyShiftingControl.xaml.cs
@@ -71,9 +71,16 @@ namespace BreCalClient
 
         private void buttonOK_Click(object sender, RoutedEventArgs e)
         {
-            this.CopyToModel();
-            this.DialogResult = true;
-            this.Close();
+            if (!CheckValues(out string message))
+            {
+                System.Windows.MessageBox.Show(message, "Warning", MessageBoxButton.OK, MessageBoxImage.Warning);
+            }
+            else
+            {
+                this.CopyToModel();
+                this.DialogResult = true;
+                this.Close();
+            }
         }
 
         private void buttonCancel_Click(object sender, RoutedEventArgs e)
@@ -86,6 +93,67 @@ namespace BreCalClient
 
         #region private methods
 
+        private bool CheckValues(out string message)
+        {
+            message = "";
+
+            if (this.datePickerETA.Value.HasValue && (this.datePickerETA.Value.Value < DateTime.Now) && (this.datePickerETA_End.Value == null))
+            {
+                message = BreCalClient.Resources.Resources.textETAInThePast;
+                return false;
+            }
+
+            if (this.datePickerETA_End.Value.HasValue && this.datePickerETA_End.Value < DateTime.Now)
+            {
+                message = BreCalClient.Resources.Resources.textETDInThePast;
+                return false;
+            }
+
+            if (this.datePickerETA.Value.HasValue && this.datePickerETA_End.Value.HasValue && this.datePickerETA.Value > this.datePickerETA_End.Value)
+            {
+                message = BreCalClient.Resources.Resources.textEndValueBeforeStartValue;
+                return false;
+            }
+
+            if (this.datePickerETD.Value.HasValue && (this.datePickerETD.Value.Value < DateTime.Now) && (this.datePickerETD_End.Value == null))
+            {
+                message = BreCalClient.Resources.Resources.textETAInThePast;
+                return false;
+            }
+
+            if (this.datePickerETD_End.Value.HasValue && this.datePickerETD_End.Value < DateTime.Now)
+            {
+                message = BreCalClient.Resources.Resources.textETDInThePast;
+                return false;
+            }
+
+            if (this.datePickerETD.Value.HasValue && this.datePickerETD_End.Value.HasValue && this.datePickerETD.Value > this.datePickerETD_End.Value)
+            {
+                message = BreCalClient.Resources.Resources.textEndValueBeforeStartValue;
+                return false;
+            }
+
+            if (this.datePickerTidalWindowFrom.Value.HasValue && (this.datePickerTidalWindowFrom.Value.Value < DateTime.Now) && (this.datePickerTidalWindowTo.Value == null))
+            {
+                message = BreCalClient.Resources.Resources.textTideTimesInThePast;
+                return false;
+            }
+
+            if (this.datePickerTidalWindowTo.Value.HasValue && this.datePickerTidalWindowTo.Value < DateTime.Now)
+            {
+                message = BreCalClient.Resources.Resources.textTideTimesInThePast;
+                return false;
+            }
+
+            if (this.datePickerTidalWindowFrom.Value.HasValue && this.datePickerTidalWindowTo.Value.HasValue && this.datePickerTidalWindowFrom.Value > this.datePickerTidalWindowTo.Value)
+            {
+                message = BreCalClient.Resources.Resources.textEndValueBeforeStartValue;
+                return false;
+            }
+
+            return true;
+        }
+
         private void CopyToModel()
         {
             if (this.ShipcallModel.Shipcall != null)
diff --git a/src/BreCalClient/EditTimesControl.xaml b/src/BreCalClient/EditTimesControl.xaml
index ad03ed9..03cac40 100644
--- a/src/BreCalClient/EditTimesControl.xaml
+++ b/src/BreCalClient/EditTimesControl.xaml
@@ -44,7 +44,7 @@
                 <ColumnDefinition Width=".5*" />
             </Grid.ColumnDefinitions>
 
-            <local:DateTimePickerExt IsEnabled="False" Grid.Row="0" Grid.Column="0" Margin="4,2,0,2" x:Name="datePickerETABerth" Format="Custom" FormatString="dd.MM. yyyy  HH:mm">
+            <local:DateTimePickerExt IsEnabled="False" Grid.Row="0" Grid.Column="0" Margin="2" x:Name="datePickerETABerth" Format="Custom" FormatString="dd.MM. yyyy  HH:mm">
                 <xctk:DateTimePicker.ContextMenu>
                     <ContextMenu>
                         <MenuItem Header="{x:Static p:Resources.textClearValue}" Name="contextMenuItemClearETA" Click="contextMenuItemClearETA_Click" >
diff --git a/src/BreCalClient/EditTimesControl.xaml.cs b/src/BreCalClient/EditTimesControl.xaml.cs
index dfd841d..74e7e0a 100644
--- a/src/BreCalClient/EditTimesControl.xaml.cs
+++ b/src/BreCalClient/EditTimesControl.xaml.cs
@@ -46,9 +46,16 @@ namespace BreCalClient
 
         private void buttonOK_Click(object sender, RoutedEventArgs e)
         {
-            this.CopyToModel();
-            this.DialogResult = true;
-            this.Close();
+            if (!CheckValues(out string message))
+            {
+                System.Windows.MessageBox.Show(message, "Warning", MessageBoxButton.OK, MessageBoxImage.Warning);
+            }
+            else
+            {
+                this.CopyToModel();
+                this.DialogResult = true;
+                this.Close();
+            }
         }        
 
         private void buttonCancel_Click(object sender, RoutedEventArgs e)
@@ -85,6 +92,44 @@ namespace BreCalClient
 
         #region private methods
 
+        private bool CheckValues(out string message)
+        {
+
+            message = "";
+
+            if (this.datePickerETABerth.Value.HasValue && (this.datePickerETABerth.Value.Value < DateTime.Now) && (this.datePickerETABerth_End.Value == null))
+            {
+                message = BreCalClient.Resources.Resources.textETAInThePast;
+                return false;
+            }
+
+            if (this.datePickerETABerth_End.Value.HasValue && this.datePickerETABerth_End.Value < DateTime.Now)
+            {
+                message = BreCalClient.Resources.Resources.textETDInThePast;
+                return false;
+            }
+
+            if (this.datePickerETABerth.Value.HasValue && this.datePickerETABerth_End.Value.HasValue && this.datePickerETABerth.Value > this.datePickerETABerth_End.Value)
+            {
+                message = BreCalClient.Resources.Resources.textEndValueBeforeStartValue;
+                return false;
+            }
+
+            if (this.datePickerLockTime.Value.HasValue && (this.datePickerLockTime.Value.Value < DateTime.Now))
+            {
+                message = BreCalClient.Resources.Resources.textLockTimeInThePast;
+                return false;
+            }
+
+            if (this.datePickerZoneEntry.Value.HasValue && this.datePickerZoneEntry.Value < DateTime.Now)
+            {
+                message = BreCalClient.Resources.Resources.textZoneEntryInThePast;
+                return false;
+            }            
+
+            return true;
+        }
+
         private void CopyToModel()
         {
             this.Times.Remarks = this.textBoxRemarks.Text.Trim().Truncate(512);
diff --git a/src/BreCalClient/EditTimesTerminalControl.xaml.cs b/src/BreCalClient/EditTimesTerminalControl.xaml.cs
index 6071ba9..6e9af6a 100644
--- a/src/BreCalClient/EditTimesTerminalControl.xaml.cs
+++ b/src/BreCalClient/EditTimesTerminalControl.xaml.cs
@@ -3,6 +3,7 @@
 // 
 
 using BreCalClient.misc.Model;
+using System;
 using System.Windows;
 
 namespace BreCalClient
@@ -61,9 +62,16 @@ namespace BreCalClient
 
         private void buttonOK_Click(object sender, RoutedEventArgs e)
         {
-            this.CopyToModel();
-            this.DialogResult = true;
-            this.Close();
+            if (!CheckValues(out string message))
+            {
+                System.Windows.MessageBox.Show(message, "Warning", MessageBoxButton.OK, MessageBoxImage.Warning);
+            }
+            else
+            {
+                this.CopyToModel();
+                this.DialogResult = true;
+                this.Close();
+            }
         }
 
         private void buttonCancel_Click(object sender, RoutedEventArgs e)
@@ -95,6 +103,50 @@ namespace BreCalClient
 
         #region private methods
 
+        private bool CheckValues(out string message)
+        {
+
+            message = "";
+
+            if (this.datePickerOperationStart.Value.HasValue && (this.datePickerOperationStart.Value.Value < DateTime.Now) && (this.datePickerOperationStart_End.Value == null))
+            {
+                message = BreCalClient.Resources.Resources.textOperationStartInThePast;
+                return false;
+            }
+
+            if (this.datePickerOperationStart_End.Value.HasValue && this.datePickerOperationStart_End.Value < DateTime.Now)
+            {
+                message = BreCalClient.Resources.Resources.textOperationStartInThePast;
+                return false;
+            }
+
+            if (this.datePickerOperationStart.Value.HasValue && this.datePickerOperationStart_End.Value.HasValue && this.datePickerOperationStart.Value > this.datePickerOperationStart_End.Value)
+            {
+                message = BreCalClient.Resources.Resources.textEndValueBeforeStartValue;
+                return false;
+            }
+
+            if (this.datePickerOperationEnd.Value.HasValue && (this.datePickerOperationEnd.Value.Value < DateTime.Now) && (this.datePickerOperationEnd_End.Value == null))
+            {
+                message = BreCalClient.Resources.Resources.textOperationEndInThePast;
+                return false;
+            }
+
+            if (this.datePickerOperationEnd_End.Value.HasValue && this.datePickerOperationEnd_End.Value < DateTime.Now)
+            {
+                message = BreCalClient.Resources.Resources.textOperationEndInThePast;
+                return false;
+            }
+
+            if (this.datePickerOperationEnd.Value.HasValue && this.datePickerOperationEnd_End.Value.HasValue && this.datePickerOperationEnd.Value > this.datePickerOperationEnd_End.Value)
+            {
+                message = BreCalClient.Resources.Resources.textEndValueBeforeStartValue;
+                return false;
+            }
+
+            return true;
+        }
+
         private void CopyToModel()
         {
             this.Times.PierSide = this.comboBoxPierside.SelectedIndex switch
diff --git a/src/BreCalClient/Resources/Resources.Designer.cs b/src/BreCalClient/Resources/Resources.Designer.cs
index 492ef15..aeada56 100644
--- a/src/BreCalClient/Resources/Resources.Designer.cs
+++ b/src/BreCalClient/Resources/Resources.Designer.cs
@@ -389,6 +389,15 @@ namespace BreCalClient.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Both tide times are required.
+        /// </summary>
+        public static string textBothTideTimesNecessary {
+            get {
+                return ResourceManager.GetString("textBothTideTimesNecessary", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to BSMD right to edit granted.
         /// </summary>
@@ -623,6 +632,15 @@ namespace BreCalClient.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Some interval end times are before start times.
+        /// </summary>
+        public static string textEndValueBeforeStartValue {
+            get {
+                return ResourceManager.GetString("textEndValueBeforeStartValue", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Ship / remark.
         /// </summary>
@@ -632,6 +650,15 @@ namespace BreCalClient.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Error.
+        /// </summary>
+        public static string textError {
+            get {
+                return ResourceManager.GetString("textError", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to ETA berth.
         /// </summary>
@@ -641,6 +668,15 @@ namespace BreCalClient.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to ETA value is in the past.
+        /// </summary>
+        public static string textETAInThePast {
+            get {
+                return ResourceManager.GetString("textETAInThePast", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to ETD berth.
         /// </summary>
@@ -650,6 +686,15 @@ namespace BreCalClient.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to ETD value is in the past.
+        /// </summary>
+        public static string textETDInThePast {
+            get {
+                return ResourceManager.GetString("textETDInThePast", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Exit.
         /// </summary>
@@ -740,6 +785,15 @@ namespace BreCalClient.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Lock time is in the past.
+        /// </summary>
+        public static string textLockTimeInThePast {
+            get {
+                return ResourceManager.GetString("textLockTimeInThePast", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Login.
         /// </summary>
@@ -830,6 +884,15 @@ namespace BreCalClient.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Operation end is in the past.
+        /// </summary>
+        public static string textOperationEndInThePast {
+            get {
+                return ResourceManager.GetString("textOperationEndInThePast", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Operations end.
         /// </summary>
@@ -848,6 +911,15 @@ namespace BreCalClient.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Operation start is in the past.
+        /// </summary>
+        public static string textOperationStartInThePast {
+            get {
+                return ResourceManager.GetString("textOperationStartInThePast", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Outgoing.
         /// </summary>
@@ -1145,6 +1217,15 @@ namespace BreCalClient.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Times for the tide window are in the past.
+        /// </summary>
+        public static string textTideTimesInThePast {
+            get {
+                return ResourceManager.GetString("textTideTimesInThePast", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Timestamp.
         /// </summary>
@@ -1262,6 +1343,15 @@ namespace BreCalClient.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Warning.
+        /// </summary>
+        public static string textWarning {
+            get {
+                return ResourceManager.GetString("textWarning", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Width.
         /// </summary>
@@ -1280,6 +1370,15 @@ namespace BreCalClient.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Zone entry time is in the past.
+        /// </summary>
+        public static string textZoneEntryInThePast {
+            get {
+                return ResourceManager.GetString("textZoneEntryInThePast", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Zone entry.
         /// </summary>
diff --git a/src/BreCalClient/Resources/Resources.de.resx b/src/BreCalClient/Resources/Resources.de.resx
index a681ad9..18947eb 100644
--- a/src/BreCalClient/Resources/Resources.de.resx
+++ b/src/BreCalClient/Resources/Resources.de.resx
@@ -508,4 +508,37 @@
   <data name="textClearAll" xml:space="preserve">
     <value>Alle Eintragungen zurücksetzen?</value>
   </data>
+  <data name="textBothTideTimesNecessary" xml:space="preserve">
+    <value>Beide Tidenzeiten sollten angegeben werden (von - bis)</value>
+  </data>
+  <data name="textEndValueBeforeStartValue" xml:space="preserve">
+    <value>Endzeit liegt vor Startzeit</value>
+  </data>
+  <data name="textError" xml:space="preserve">
+    <value>Error</value>
+  </data>
+  <data name="textETAInThePast" xml:space="preserve">
+    <value>Zeitpunkt ETA liegt in der Vergangenheit</value>
+  </data>
+  <data name="textETDInThePast" xml:space="preserve">
+    <value>Zeitpunkt ETD liegt in der Vergangenheit</value>
+  </data>
+  <data name="textLockTimeInThePast" xml:space="preserve">
+    <value>Schleusenzeit liegt in der Vergangenheit</value>
+  </data>
+  <data name="textOperationEndInThePast" xml:space="preserve">
+    <value>Operation Endzeit liegt in der Vergangenheit</value>
+  </data>
+  <data name="textOperationStartInThePast" xml:space="preserve">
+    <value>Operation Startzeit liegt in der Vergangenheit</value>
+  </data>
+  <data name="textTideTimesInThePast" xml:space="preserve">
+    <value>Tidenzeit liegt in der Vergangenheit</value>
+  </data>
+  <data name="textWarning" xml:space="preserve">
+    <value>Warnung</value>
+  </data>
+  <data name="textZoneEntryInThePast" xml:space="preserve">
+    <value>Zeit Reviereintritt liegt in der Vergangenheit</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/BreCalClient/Resources/Resources.resx b/src/BreCalClient/Resources/Resources.resx
index 1cf2a78..14cf0f9 100644
--- a/src/BreCalClient/Resources/Resources.resx
+++ b/src/BreCalClient/Resources/Resources.resx
@@ -214,6 +214,9 @@
   <data name="textBerths" xml:space="preserve">
     <value>Berths</value>
   </data>
+  <data name="textBothTideTimesNecessary" xml:space="preserve">
+    <value>Both tide times are required</value>
+  </data>
   <data name="textBSMDGranted" xml:space="preserve">
     <value>BSMD right to edit granted</value>
   </data>
@@ -292,15 +295,27 @@
   <data name="textEmail" xml:space="preserve">
     <value>E-mail</value>
   </data>
+  <data name="textEndValueBeforeStartValue" xml:space="preserve">
+    <value>Some interval end times are before start times</value>
+  </data>
   <data name="textEnterKeyword" xml:space="preserve">
     <value>Ship / remark</value>
   </data>
+  <data name="textError" xml:space="preserve">
+    <value>Error</value>
+  </data>
   <data name="textETABerth" xml:space="preserve">
     <value>ETA berth</value>
   </data>
+  <data name="textETAInThePast" xml:space="preserve">
+    <value>ETA value is in the past</value>
+  </data>
   <data name="textETDBerth" xml:space="preserve">
     <value>ETD berth</value>
   </data>
+  <data name="textETDInThePast" xml:space="preserve">
+    <value>ETD value is in the past</value>
+  </data>
   <data name="textExit" xml:space="preserve">
     <value>Exit</value>
   </data>
@@ -331,6 +346,9 @@
   <data name="textLockTime" xml:space="preserve">
     <value>Lock time</value>
   </data>
+  <data name="textLockTimeInThePast" xml:space="preserve">
+    <value>Lock time is in the past</value>
+  </data>
   <data name="textLogin" xml:space="preserve">
     <value>Login</value>
   </data>
@@ -361,12 +379,18 @@
   <data name="textOperation" xml:space="preserve">
     <value>Operation</value>
   </data>
+  <data name="textOperationEndInThePast" xml:space="preserve">
+    <value>Operation end is in the past</value>
+  </data>
   <data name="textOperationsEnd" xml:space="preserve">
     <value>Operations end</value>
   </data>
   <data name="textOperationsStart" xml:space="preserve">
     <value>Operations start</value>
   </data>
+  <data name="textOperationStartInThePast" xml:space="preserve">
+    <value>Operation start is in the past</value>
+  </data>
   <data name="textOutgoing" xml:space="preserve">
     <value>Outgoing</value>
   </data>
@@ -466,6 +490,9 @@
   <data name="textTidalWindow" xml:space="preserve">
     <value>Tidal window</value>
   </data>
+  <data name="textTideTimesInThePast" xml:space="preserve">
+    <value>Times for the tide window are in the past</value>
+  </data>
   <data name="textTimestamp" xml:space="preserve">
     <value>Timestamp</value>
   </data>
@@ -505,12 +532,18 @@
   <data name="textVoyage" xml:space="preserve">
     <value>Voyage</value>
   </data>
+  <data name="textWarning" xml:space="preserve">
+    <value>Warning</value>
+  </data>
   <data name="textWidth" xml:space="preserve">
     <value>Width</value>
   </data>
   <data name="textWrongCredentials" xml:space="preserve">
     <value>Wrong username or password</value>
   </data>
+  <data name="textZoneEntryInThePast" xml:space="preserve">
+    <value>Zone entry time is in the past</value>
+  </data>
   <data name="textZoneEntryTime" xml:space="preserve">
     <value>Zone entry</value>
   </data>