def r(self):
        return self.format('D, j M Y H:i:s O')
RFC 2822 formatted date; e.g. 'Thu, 21 Dec 2000 16:01:07 +0200'
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/utils/dateformat.py/DateFormat.r