* update day tracker table*

        **Key Arguments:**
            # -

        **Return:**
            - None

        **Usage:**
            ..  todo::

                - add usage info
                - create a sublime snippet for usage
                - write a command-line tool for this method
                - update package tutorial with command-line tool info if needed

            .. code-block:: python 

                usage code

def _update_day_tracker_table(
            self):
        """* update day tracker table*

        **Key Arguments:**
            # -

        **Return:**
            - None

        **Usage:**
            ..  todo::

                - add usage info
                - create a sublime snippet for usage
                - write a command-line tool for this method
                - update package tutorial with command-line tool info if needed

            .. code-block:: python 

                usage code 

        """
        self.log.info('starting the ``_update_day_tracker_table`` method')

        # YESTERDAY MJD
        mjd = now(
            log=self.log
        ).get_mjd()
        yesterday = int(math.floor(mjd - 1))

        sqlQuery = u"""
            SELECT mjd FROM atlas_moving_objects.day_tracker order by mjd desc limit 1
        """ % locals()
        rows = readquery(
            log=self.log,
            sqlQuery=sqlQuery,
            dbConn=self.atlasMoversDBConn,
        )
        highestMjd = int(rows[0]["mjd"])

        converter = conversions(
            log=self.log
        )

        sqlData = []
        for m in range(highestMjd, yesterday):
            # CONVERTER TO CONVERT MJD TO DATE
            utDate = converter.mjd_to_ut_datetime(
                mjd=m,
                sqlDate=True,
                datetimeObject=False
            )
            sqlData.append({
                "mjd": m,
                "ut_date": utDate
            })

        insert_list_of_dictionaries_into_database_tables(
            dbConn=self.atlasMoversDBConn,
            log=self.log,
            dictList=sqlData,
            dbTableName="day_tracker",
            uniqueKeyList=["mjd"],
            dateModified=False,
            batchSize=10000,
            replace=True
        )

        self.atlasMoversDBConn.commit()

        self.log.info('completed the ``_update_day_tracker_table`` method')
        return None