=== modified file 'base_calendar/base_calendar.py'
--- base_calendar/base_calendar.py	2013-09-17 09:39:06 +0000
+++ base_calendar/base_calendar.py	2013-10-08 09:28:54 +0000
@@ -397,7 +397,7 @@
 
     def copy(self, cr, uid, id, default=None, context=None):
         raise osv.except_osv(_('Warning!'), _('You cannot duplicate a calendar attendee.'))
-    
+
     def onchange_partner_id(self, cr, uid, ids, partner_id,context=None):
         """
         Make entry on email and availbility on change of partner_id field.
@@ -408,12 +408,12 @@
         @param context: a standard dictionary for contextual values
         @return: dictionary of values which put value in email and availability fields
         """
-        
+
         if not partner_id:
             return {'value': {'email': ''}}
         partner = self.pool.get('res.partner').browse(cr, uid, partner_id, context=context)
         return {'value': {'email': partner.email}}
-    
+
     def get_ics_file(self, cr, uid, event_obj, context=None):
         """
         Returns iCalendar file for the event invitation.
@@ -1364,6 +1364,18 @@
             data['end_type'] = 'end_date'
         return data
 
+    def _multikeysort(self, items, columns):
+        from operator import itemgetter
+        comparers = [ ((itemgetter(col[1:].strip()), -1) if col.startswith('-') else (itemgetter(col.strip()), 1)) for col in columns]
+        def comparer(left, right):
+            for fn, mult in comparers:
+                result = cmp(fn(left), fn(right))
+                if result:
+                    return mult * result
+            else:
+                return 0
+        return sorted(items, cmp=comparer)
+
     def search(self, cr, uid, args, offset=0, limit=0, order=None, context=None, count=False):
         if context is None:
             context = {}
@@ -1382,6 +1394,19 @@
         res = super(calendar_event, self).search(cr, uid, new_args, offset=0, limit=0, order=order, context=context, count=False)
         if context.get('virtual_id', True):
             res = self.get_recurrent_ids(cr, uid, res, args, limit, context=context)
+            if order:
+                order = order.split(',')
+                sortby = {}
+                for o in order:
+                    spl = o.split()
+                    sortby[spl[0]] = spl[1]
+                ordered = []
+                fields = sortby.keys()
+                for id in res:
+                    ordered.append(self.read(cr, uid, id, fields=fields, context=context))
+                res = self._multikeysort(ordered, [key.split()[0] if sortby[key.split()[0]] == 'ASC' else '-%s' % key.split()[0] for key in order])
+                res = [x['id'] for x in res]
+
         if count:
             return len(res)
         elif limit: