diff --git a/ChangeLog b/ChangeLog
index 19444f447..d11c7a0a2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2011-02-11  Wolfgang Sourdeau  <wsourdeau@inverse.ca>
 
+	* OpenChange/MAPIStoreCalendarMessageTable.m
+	(-sortIdentifierForProperty:): implemented basic table.
+
 	* OpenChange/MAPIStoreGCSMessageTable.m (-setSordOrder:):
 	implemented overriden method, making use of the new
 	"sortIdentifierForProperty:" subclass method for the mapping of
diff --git a/OpenChange/MAPIStoreCalendarMessageTable.m b/OpenChange/MAPIStoreCalendarMessageTable.m
index 23382fdcd..dfd4c04af 100644
--- a/OpenChange/MAPIStoreCalendarMessageTable.m
+++ b/OpenChange/MAPIStoreCalendarMessageTable.m
@@ -201,4 +201,20 @@
   return [knownProperties objectForKey: MAPIPropertyKey (property)];
 }
 
+/* sorting */
+
+- (NSString *) sortIdentifierForProperty: (enum MAPITAGS) property
+{
+  static NSMutableDictionary *knownProperties = nil;
+
+  if (!knownProperties)
+    {
+      knownProperties = [NSMutableDictionary new];
+      [knownProperties setObject: @"c_startdate"
+                          forKey: MAPIPropertyKey (PidLidAppointmentStartWhole)];
+    }
+
+  return [knownProperties objectForKey: MAPIPropertyKey (property)];
+}
+
 @end