AWS – Amazon RDS for Oracle supports time zone auto-upgrade for Single-tenant instances
Starting today, Amazon Relational Database Service (Amazon RDS) for Oracle supports the auto-upgrade of Oracle time zone files for DB instances on the multitenant container database (CDB) architecture running in single-tenant configuration. The Oracle time zone file auto-upgrade feature provides an automated way to upgrade the daylight savings time (DST) time zone file version in the DB instance.
Read More for the details.