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Impact of Changes to Daylight Saving Time (DST) Rules on the Oracle Database (Doc ID 357056.1)

Last updated on JANUARY 30, 2022

Applies to:

Oracle Database Cloud Service - Version N/A and later
Oracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.


This note describes the impact of changes to DST rules on the Oracle database in general.

For specific information on Oracle database patches for changes to the DST rules please refer to: <Note 412160.1> Updated Time Zones in Oracle Time Zone File patches


This bulletin is intended for DBAs who are worried that any (upcoming) DST changes in their region will require many updates to their Oracle databases.


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In this Document
 The DATE datatype and SYSDATE
 The Database timezone
 Standard use of time zone and DST information in the database, not including the OJVM
 Updates to Database and OJVM time zone files

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