Check the current version of Time zone

SQL> SELECT version FROM v$timezone_file;

   VERSION
----------
        32

SQL> SELECT PROPERTY_NAME, SUBSTR(property_value, 1, 30) value FROM DATABASE_PROPERTIES WHERE PROPERTY_NAME LIKE 'DST_%' ORDER BY PROPERTY_NAME;

PROPERTY_NAME             VALUE
------------------------- ----------
DST_PRIMARY_TT_VERSION    32
DST_SECONDARY_TT_VERSION  0
DST_UPGRADE_STATE         NONE