Applying the DSTv26 update for the Oracle Database
(Doc ID 2143254.1)
Last updated on JANUARY 09, 2025
Applies to:
Oracle Database - Standard Edition - Version 10.1.0.5 to 12.1.0.2 [Release 10.1 to 12.1] Oracle Database - Enterprise Edition - Version 10.1.0.5 to 12.1.0.2 [Release 10.1 to 12.1] Oracle Database Cloud Schema Service - Version N/A and later Oracle Database Exadata Express Cloud Service - Version N/A and later Oracle Database Exadata Cloud Machine - Version N/A and later Information in this document applies to any platform.
Purpose
There are no "PSU DST patches" , for example an Oracle DST patch for 11.2.0.4 can be applied using Opatch on *any* 11.2.0.4 PSU (same goes for any other Oracle RDBMS version)
Note that backports to versions who are NOT in Premier Support are possible / available for download only for customers with a valid Extended Support . Exceptions for other version/platform combination are only possible for customers with an existing Extended Support contract for the specific version/platform combination or platforms with Extended Support Fee Waiver Period. Please log a SR if you need a backport to such a platform / version (if you need several log 1 SR clearly stating which version/platforms you have Extended Support contract for and need ). See <Note 412160.1> , section "G) For what versions are DST patches provided / there is no DST version X for my Oracle RDBMS version?" Please consult your Sales representative to enroll in an Extended Support contract if required. If you log a SR requesting a backport or the password for versions in Extended Support and there is no Extended Support contract in place the patch cannot be provided.
The RDBMS DSTv26 update includes the timezone information from the IANA ( http://www.iana.org/time-zones ) data tzdata2016d.tar and contains all previous Oracle RDBMS DST updates.
A complete overview of timezone updates is found in <Note 412160.1> Updated DST Transitions and New Time Zones in Oracle RDBMS and OJVM Time Zone File Patches.
The changes included in DSTv26 patch (and not included in DSTv25) are:
America/Cayman will not observe daylight saving in 2016. Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00 Asia/Tehran has DST predictions for the year 2038 and later Haiti will not observe DST in 2016. Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00 Azerbaijan no longer observes DST Chile reverts from permanent to seasonal DST (2016) America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30. Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00.
Compared to DSTv25 this is the list of updated timezones in DSTv26 for non historical dates ( meaning update to the timezone after 1970):
This note will give an overview on what checks to perform before applying the DSTv26 update. Note that all DST patches are always cumulative, which means they contain also ALL the previous DST changes / corrections.
Please note that SYSDATE is NOT affected by "Oracle DST patches" seen SYSDATE is purely depending on the OS to get the time. So even an "unpatched database" will return a correct SYSDATE if the server (OS) time is correct. For "sysdate" you do not need any DST patch <note 1627439.1> How to diagnose wrong time ( SYSDATE and SYSTIMESTAMP) after DST change , server reboot , database restart or installation when connecting to a database on an Unix server For more information about Timestamp with (local) Time Zone please check <Note 340512.1> Timestamps & time zones - Frequently Asked Questions
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