Get a datetime object for a date between January 1, 001 and now
        :param tzinfo: timezone, instance of datetime.tzinfo subclass
        :example DateTime('1265-03-22 21:15:52')
        :return datetime

def date_time_ad(self, tzinfo=None, end_datetime=None, start_datetime=None):
        """
        Get a datetime object for a date between January 1, 001 and now
        :param tzinfo: timezone, instance of datetime.tzinfo subclass
        :example DateTime('1265-03-22 21:15:52')
        :return datetime
        """

        # 1970-01-01 00:00:00 UTC minus 62135596800 seconds is
        # 0001-01-01 00:00:00 UTC.  Since _parse_end_datetime() is used
        # elsewhere where a default value of 0 is expected, we can't
        # simply change that class method to use this magic number as a
        # default value when None is provided.

        start_time = -62135596800 if start_datetime is None else self._parse_start_datetime(start_datetime)
        end_datetime = self._parse_end_datetime(end_datetime)

        ts = self.generator.random.randint(start_time, end_datetime)
        # NOTE: using datetime.fromtimestamp(ts) directly will raise
        #       a "ValueError: timestamp out of range for platform time_t"
        #       on some platforms due to system C functions;
        #       see http://stackoverflow.com/a/10588133/2315612
        # NOTE: On windows, the lowest value you can get from windows is 86400
        #       on the first day. Known python issue:
        #       https://bugs.python.org/issue30684
        return datetime(1970, 1, 1, tzinfo=tzinfo) + timedelta(seconds=ts)