def date(self):
        return date(self.__year, self.__month, self.__day)
Returns entity kind.
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/datetime.py/datetime.date--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/mapreduce/model.py/MapreduceState.kind