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Northern Cyprus Reintroduces DST in October 2017 - Impact on Oracle RDBMS (Doc ID 2331529.1)

Last updated on FEBRUARY 22, 2019

Applies to:

Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata 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
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.

Purpose

 

Northern Cyprus is now +03 year round, causing a split in Cyprus time zones starting 2016-10-30 at 04:00. This creates a zone Asia/Famagusta.


The affected timezones are :

Asia/Famagusta

For Questions/official statements about the timezone change itself, please contact the Northern Cyprus Government .

IANA has updated Time Zone Database to reflect this change (tzdata2017c) http://www.iana.org/time-zones

 

This change is included in DSTv31.


Scope

Anyone who may be using the affected Northern Cyprus Timezone

The Oracle kernel itself is also not impacted by the OS/system clock changes (or for that matter Oracle DST patches). <Note:1013279.6> How Does Daylight Savings Time Affect The Database Kernel?

Used abbreviations:
TZ: TimeZone
TSTZ: TimeStamp with Time Zone
TSLTZ: TimeStamp with Local Time Zone

Details

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In this Document
Purpose
Scope
Details
  1) The DATE dataype and SYSDATE / SYSTIMESTAMP
 2) Storing data in the TimeStamp with (Local) Time Zone datatype.
 3) TimeStamp with Time Zone columns are used, how do I see if the affected Northern Cyprus Timezones are stored?
 4) Database timezone , Session timezone and CURRENT_DATE , LOCALTIMESTAMP , CURRENT_TIMESTAMP functions
 5) Oracle DST patches and this change.
 6) The OJVM dst information
 7) Java in the Database home
 8) Other Oracle software (Enterprise Manager , Oracle Applications etc)
 9) Will any data stored in DATE, TIMESTAMP, TIMESTAMP WITH (LOCAL) TIMEZONE columns be affected by changing the server OS timezone?
References

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