diff --git a/SoObjects/Appointments/English.lproj/Localizable.strings b/SoObjects/Appointments/English.lproj/Localizable.strings
index f25897d4a6..84f5e5d7d4 100644
--- a/SoObjects/Appointments/English.lproj/Localizable.strings
+++ b/SoObjects/Appointments/English.lproj/Localizable.strings
@@ -18,6 +18,8 @@ vtodo_class2 = "(Confidential task)";
 "calendar_label" = "Calendar";
 "startDate_label" = "Start";
 "endDate_label" = "End";
+"time_label" = "Time";
+"to_label" = "to";
 "due_label" = "Due Date";
 "location_label" = "Location";
 "summary_label" = "Summary";
diff --git a/SoObjects/Appointments/SOGoAptMailNotification.m b/SoObjects/Appointments/SOGoAptMailNotification.m
index 4c26191ae8..c57c89adb9 100644
--- a/SoObjects/Appointments/SOGoAptMailNotification.m
+++ b/SoObjects/Appointments/SOGoAptMailNotification.m
@@ -27,6 +27,7 @@
 #import <NGObjWeb/WOActionResults.h>
 #import <NGObjWeb/WOContext+SoObjects.h>
 #import <NGObjWeb/WOResponse.h>
+#import <NGExtensions/NSCalendarDate+misc.h>
 #import <NGExtensions/NSObject+Logs.h>
 #import <NGCards/iCalEvent.h>
 #import <NGCards/iCalPerson.h>
@@ -186,6 +187,19 @@ - (NSString *) sentByText
   return sentByText;
 }
 
+- (NSTimeInterval) duration
+{
+  return [[self newEndDate] timeIntervalSinceDate:[self newStartDate]];
+}
+
+- (BOOL) isEndDateOnSameDay
+{
+  if ([[self apt] isAllDay])
+    return ([self duration] <= 86400);
+
+  return [[self newStartDate] isDateOnSameDay: [self newEndDate]];
+}
+
 - (NSString *) formattedAptStartDate
 {
   NSString *s;
diff --git a/UI/MailPartViewers/UIxMailPartICalViewer.m b/UI/MailPartViewers/UIxMailPartICalViewer.m
index b54f452b50..98c8cedfde 100644
--- a/UI/MailPartViewers/UIxMailPartICalViewer.m
+++ b/UI/MailPartViewers/UIxMailPartICalViewer.m
@@ -221,19 +221,17 @@ - (NSString *) endTime
   return [[self dateFormatter] formattedTime: [self endCalendarDate]];
 }
 
-- (BOOL) isEndDateOnSameDay
+- (NSTimeInterval) duration
 {
-  NSCalendarDate *aDate;
-  if ([[self inEvent] isAllDay])
-    aDate = [[self endCalendarDate] dateByAddingYears:0 months:0 days:0 hours:0 minutes:0 seconds:-1];
-  else
-    aDate = [self endCalendarDate];
-  return [[self startCalendarDate] isDateOnSameDay: aDate];
+  return [[self endCalendarDate] timeIntervalSinceDate:[self startCalendarDate]];
 }
 
-- (NSTimeInterval) duration
+- (BOOL) isEndDateOnSameDay
 {
-  return [[self endCalendarDate] timeIntervalSinceDate:[self startCalendarDate]];
+  if ([[self inEvent] isAllDay])
+    return [self duration] <= 86400;
+
+  return [[self startCalendarDate] isDateOnSameDay: [self endCalendarDate]];
 }
 
 /* calendar folder support */
diff --git a/UI/Templates/Appointments/SOGoAptMailInvitation.wox b/UI/Templates/Appointments/SOGoAptMailInvitation.wox
index 1abc714239..a389986c19 100644
--- a/UI/Templates/Appointments/SOGoAptMailInvitation.wox
+++ b/UI/Templates/Appointments/SOGoAptMailInvitation.wox
@@ -23,10 +23,19 @@ th, td { font-family: Lucida Grande, Bitstream VeraSans, Tahoma, sans-serif; fon
       ><tr>
         <th align="right" style="font-weight: bold;"><var:string label:value="location_label" const:escapeHTML="NO"/></th>
         <td><var:string value="location" const:escapeHTML="NO"/></td>
-      </tr
-      ></var:if>
+      </tr></var:if>
+
+      <var:if condition="apt.isAllDay">
       <tr>
-        <th align="right" style="font-weight: bold;"><var:string label:value="startDate_label" const:escapeHTML="NO"/></th>
+	<th align="right" style="font-weight: bold;"><var:string label:value="time_label" const:escapeHTML="NO"/></th>
+        <td><var:string value="formattedAptStartDate"
+      const:escapeHTML="NO"/><var:if condition="isEndDateOnSameDay" const:negate="YES"> <var:string label:value="to_label" const:escapeHTML="NO"/> <var:string value="formattedAptEndDate" const:escapeHTML="NO"/>
+           </var:if></td>
+      </tr>
+      </var:if>
+      <var:if condition="apt.isAllDay" const:negate="YES">
+      <tr>
+	<th align="right" style="font-weight: bold;"><var:string label:value="startDate_label" const:escapeHTML="NO"/></th>
         <td><var:string value="formattedAptStartDate" const:escapeHTML="NO"
            /><var:if condition="formattedAptStartTime.length"> - <var:string value="formattedAptStartTime" const:escapeHTML="NO"/> <var:string value="viewTZ" const:escapeHTML="NO"/>
            </var:if></td>
@@ -36,7 +45,8 @@ th, td { font-family: Lucida Grande, Bitstream VeraSans, Tahoma, sans-serif; fon
         <td><var:string value="formattedAptEndDate" const:escapeHTML="NO"
            /><var:if condition="formattedAptEndTime.length"> - <var:string value="formattedAptEndTime" const:escapeHTML="NO"/> <var:string value="viewTZ" const:escapeHTML="NO"/>
            </var:if></td>
-      </tr>
+	 </tr>
+      </var:if>
       <var:if condition="apt.comment.length"
       ><tr>
         <th align="right" style="font-weight: bold;"><var:string label:value="comment_label" const:escapeHTML="NO"/></th>