code: def _datetime_to_rfc3339(value, ignore_zone=True):
      
      if not ignore_zone and value.tzinfo is not None:
          # Convert to UTC and remove the time zone info.
          value = value.replace(tzinfo=None) - value.utcoffset()
  
      return value.strftime(_RFC3339_MICROS)
docs: Convert a timestamp to a string.
  
      :type value: :class:`datetime.datetime`
      :param value: The datetime object to be converted to a string.
  
      :type ignore_zone: bool
      :param ignore_zone: If True, then the timezone (if any) of the datetime
                          object is ignored.
  
      :rtype: str
      :returns: The string representing the datetime stamp.