Remove all stored information about this date (meals or closed
            information).

            :param date: Date of the day
            :type date: datetime.date

def clearDay(self, date):
        """ Remove all stored information about this date (meals or closed
            information).

            :param date: Date of the day
            :type date: datetime.date"""
        date = self._handleDate(date)
        if date in self._days:
            del self._days[date]