diff --git a/SoObjects/Appointments/iCalRepeatableEntityObject+SOGo.m b/SoObjects/Appointments/iCalRepeatableEntityObject+SOGo.m
index 7065dbb1e..cfe8e7647 100644
--- a/SoObjects/Appointments/iCalRepeatableEntityObject+SOGo.m
+++ b/SoObjects/Appointments/iCalRepeatableEntityObject+SOGo.m
@@ -126,7 +126,29 @@
       if ([[rule byDay] length])
         [repeat setObject: [[rule byDayMask] asRuleArray] forKey: @"days"];
       if ([[rule byMonthDay] count])
-        [repeat setObject: [rule byMonthDay] forKey: @"monthdays"];
+        {
+          NSMutableArray *byMonthDay = [NSMutableArray arrayWithArray: [rule byMonthDay]];
+          NSMutableArray *byDay = [NSMutableArray array];
+          NSInteger i, count;
+          count = [byMonthDay count];
+          for (i = count - 1; i >= 0; i--)
+            {
+              NSString *day = [byMonthDay objectAtIndex: i];
+              if ([day intValue] < 0)
+                {
+                  // Relative BYMONTHDAY mask are moved to the "days" array
+                  [byDay addObject: [NSDictionary dictionaryWithObjectsAndKeys:
+                                                    @"relative", @"day",
+                                                  day, @"occurrence",
+                                                  nil]];
+                  [byMonthDay removeObjectAtIndex: i];
+                }
+            }
+          if ([byMonthDay count])
+            [repeat setObject: byMonthDay forKey: @"monthdays"];
+          if ([byDay count])
+            [repeat setObject: byDay forKey: @"days"];
+        }
       if ([[rule byMonth] count])
         [repeat setObject: [rule byMonth] forKey: @"months"];
       [data setObject: repeat forKey: @"repeat"];
diff --git a/UI/Scheduler/UIxRecurrenceEditor.m b/UI/Scheduler/UIxRecurrenceEditor.m
index 5a4c4e59c..1d66364e6 100644
--- a/UI/Scheduler/UIxRecurrenceEditor.m
+++ b/UI/Scheduler/UIxRecurrenceEditor.m
@@ -145,22 +145,6 @@
   return text;
 }
 
-- (NSString *) idForWeekDay
-{
-  static NSArray *shortWeekDaysList = nil;
-  NSString *id;
-
-  if (!shortWeekDaysList)
-    {
-      shortWeekDaysList = [locale objectForKey: NSShortWeekDayNameArray];
-      [shortWeekDaysList retain];
-    }
-
-  id = [NSString stringWithFormat: @"weekDay%i", (int)[shortWeekDaysList indexOfObject: item]];
-
-  return id;
-}
-
 - (NSString *) labelForWeekDay
 {
   return item;
@@ -197,7 +181,7 @@
 
   i = [[self monthlyDayList] indexOfObject: item];
   if (i % 7 != i)
-    return @"";
+    return @"relative";
   else
     return iCalWeekDayString[i];
 }
diff --git a/UI/WebServerResources/js/Scheduler/Component.service.js b/UI/WebServerResources/js/Scheduler/Component.service.js
index 255671379..7737c080a 100644
--- a/UI/WebServerResources/js/Scheduler/Component.service.js
+++ b/UI/WebServerResources/js/Scheduler/Component.service.js
@@ -1171,7 +1171,7 @@
 
     // Update recurrence definition depending on selections
     if (this.hasCustomRepeat()) {
-      if (this.repeat.frequency == 'monthly' && this.repeat.month.type && this.repeat.month.type == 'byday' ||
+      if (this.repeat.frequency == 'monthly' && this.repeat.month.type && this.repeat.month.type == 'byday' && this.repeat.month.day != 'relative' ||
           this.repeat.frequency == 'yearly' && this.repeat.year.byday) {
         // BYDAY mask for a monthly or yearly recurrence
         delete component.repeat.monthdays;
@@ -1181,6 +1181,8 @@
                this.repeat.month.type) {
         // montly recurrence by month days or yearly by month
         delete component.repeat.days;
+        if (this.repeat.month.day == 'relative')
+          component.repeat.monthdays = [this.repeat.month.occurrence];
       }
     }
     else if (this.repeat.frequency && this.repeat.frequency != 'never') {