Oracle 11.2.0.4.0 SE-1, 64-bit

Oracle Linux 6

Upgrading db to 12.1.0.2.0 SE-2

So I take care all the prereqs and DBUA runs without complaint.  On the Upgrade Options screen, I select to "Upgrade Timezone Data".  Then, as recommended, I follow up with the 'postupgrade_fixups.sql' script, which reports the following:

**********************************************************************Check Tag:     OLD_TIME_ZONES_EXISTCheck Summary: Check for use of older timezone data fileFix Summary:   Update the timezone using the DBMS_DST package after upgrade is complete.**********************************************************************Fixup Returned Information:INFORMATION: --> Older Timezone in use     Database is using a time zone file older than version 18.     After the upgrade, it is recommended that DBMS_DST package     be used to upgrade the 12.1.0.2.0 database time zone version     to the latest version which comes with the new release.     Please refer to My Oracle Support note number 1509653.1 for details.**********************************************************************