def METHOD_NAME(self, hour):
    st_xml = '<?xml version=\'1.0\' ?><start_time id="start_time"><st'\
             'art_time>2012-01-11T%d:00:00.000+00</start_time></start'\
             '_time>' % hour
    try:
        create_instance(self.user.username, TempFileProxy(st_xml), [])
    except DuplicateInstance:
        pass