code: def _parse_filter_word(self, word):
          
          if isinstance(word, str):
              word = "'{}'".format(word)
          elif isinstance(word, dt.date):
              if isinstance(word, dt.datetime):
                  if word.tzinfo is None:
                      # if it's a naive datetime, localize the datetime.
                      word = self.protocol.timezone.localize(
                          word)  # localize datetime into local tz
                  if word.tzinfo != pytz.utc:
                      word = word.astimezone(
                          pytz.utc)  # transform local datetime to utc
              if '/' in self._attribute:
                  # TODO: this is a fix for the case when the parameter
                  #  filtered is a string instead a dateTimeOffset
                  #  but checking the '/' is not correct, but it will
                  #  differentiate for now the case on events:
                  #  start/dateTime (date is a string here) from
                  #  the case on other dates such as
                  #  receivedDateTime (date is a dateTimeOffset)
                  word = "'{}'".format(
                      word.isoformat())  # convert datetime to isoformat.
              else:
                  word = "{}".format(
                      word.isoformat())  # convert datetime to isoformat
          elif isinstance(word, bool):
              word = str(word).lower()
          return word
docs: Converts the word parameter into the correct format