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Mongolia no Longer Observes DST From 2017 - Impact on Oracle RDBMS (Doc ID 2288061.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1 to 12.2.0.1 [Release 11.2 to 12.2]
Information in this document applies to any platform.

Purpose

 

Mongolia abolished DST from 2017..


The affected timezones are :

Asia/Ulaanbaatar, Asia/Hovd

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

IANA has updated Time Zone Database to reflect this change (tzdata2017a) http://www.iana.org/time-zones


This is included in DSTv30. Refer to <Note 2288060.1> : Applying the DSTv30 update for the Oracle Database


Scope

Anyone who may be using the affected Mongolian Timezones

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 Russian 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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