diff --git a/addons/caldav/calendar.py b/addons/caldav/calendar.py
index 8a40d7c253d..c60bccad036 100644
--- a/addons/caldav/calendar.py
+++ b/addons/caldav/calendar.py
@@ -257,6 +257,9 @@ class CalDAV(object):
             if cal_data.name.lower() in self.__attribute__:
                 if cal_data.params.get('X-VOBJ-ORIGINAL-TZID'):
                     self.ical_set('vtimezone', cal_data.params.get('X-VOBJ-ORIGINAL-TZID'), 'value')
+                    date_utc = cal_data.value.astimezone(pytz.utc)
+                    self.ical_set(cal_data.name.lower(), date_utc, 'value')
+                    continue
                 self.ical_set(cal_data.name.lower(), cal_data.value, 'value')
         vals = map_data(cr, uid, self, context=context)
         return vals
@@ -331,8 +334,7 @@ class CalDAV(object):
                             if tzval:
                                 date_1 = datetime.strptime(data[map_field], '%Y-%m-%d %H:%M:%S')
                                 desttz = pytz.timezone(tzval.title())
-                                srctz = pytz.timezone('GMT')
-                                date_gmt = date_1.replace(tzinfo=srctz).astimezone(desttz).strftime('%Y-%m-%d %H:%M:%S')
+                                date_gmt = date_1.replace(tzinfo=pytz.utc).astimezone(desttz).strftime('%Y-%m-%d %H:%M:%S')
                                 dtfield.params['TZID'] = [tzval.title()]
                                 dtfield.value = parser.parse(date_gmt)
                             else: