def ctime(self):
        return tmxxx(self.__year, self.__month, self.__day).ctime()
https://github.com/dimagi/commcare/wiki/casexml20
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/datetime.py/date.ctime--crossover with--dataset/ETHPy150Open dimagi/commcare-hq/corehq/ex-submodules/casexml/apps/case/mock.py/CaseBlock.__init__