diff --git a/addons/calendar/i18n/calendar.pot b/addons/calendar/i18n/calendar.pot
index f13382c3979623b4e633dd416c8063547b7d6ab2..362f33b234410129b04c096e1d3c85c57b74d34d 100644
--- a/addons/calendar/i18n/calendar.pot
+++ b/addons/calendar/i18n/calendar.pot
@@ -6,8 +6,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Odoo Server 11.0\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-02-07 10:30+0000\n"
-"PO-Revision-Date: 2018-02-07 10:30+0000\n"
+"POT-Creation-Date: 2018-06-06 08:01+0000\n"
+"PO-Revision-Date: 2018-06-06 08:01+0000\n"
 "Last-Translator: <>\n"
 "Language-Team: \n"
 "MIME-Version: 1.0\n"
@@ -870,6 +870,13 @@ msgstr ""
 msgid "Meeting"
 msgstr ""
 
+#. module: calendar
+#: code:addons/calendar/models/calendar.py:933
+#: code:addons/calendar/models/calendar.py:937
+#, python-format
+msgid "Meeting '%s' starts '%s' and ends '%s'"
+msgstr ""
+
 #. module: calendar
 #: model:ir.ui.view,arch_db:calendar.view_calendar_event_form
 msgid "Meeting Details"
diff --git a/addons/calendar/models/calendar.py b/addons/calendar/models/calendar.py
index e84825a0c5d2c5072ffe187d91c3ac540a285bf5..757d425d39c9d3dd2cb250549e49b7d4dc14079b 100644
--- a/addons/calendar/models/calendar.py
+++ b/addons/calendar/models/calendar.py
@@ -929,9 +929,13 @@ class Meeting(models.Model):
     def _check_closing_date(self):
         for meeting in self:
             if meeting.start_datetime and meeting.stop_datetime and meeting.stop_datetime < meeting.start_datetime:
-                raise ValidationError(_('Ending datetime cannot be set before starting datetime.'))
+                raise ValidationError(_('Ending datetime cannot be set before starting datetime.') + "\n" +
+                                      _("Meeting '%s' starts '%s' and ends '%s'") % (meeting.name, meeting.start_datetime, meeting.stop_datetime)
+                    )
             if meeting.start_date and meeting.stop_date and meeting.stop_date < meeting.start_date:
-                raise ValidationError(_('Ending date cannot be set before starting date.'))
+                raise ValidationError(_('Ending date cannot be set before starting date.') + "\n" +
+                                      _("Meeting '%s' starts '%s' and ends '%s'") % (meeting.name, meeting.start_date, meeting.stop_date)
+                    )
 
     @api.onchange('start_datetime', 'duration')
     def _onchange_duration(self):