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Western Australia Daylight Saving Time: Impact on WebSphere Studio Application Developer Integration Edition as of 3 December 2006

 Flash (Alert)
 
Abstract
Information about the impact of time zone changes in Western Australia starting on 3 December 2006. Without the required update to the Java™ time zone tables, times will be incorrect by one hour.
 
Content
The following link provides more information regarding the change in Daylight Saving Time for Western Australia:
The dates affected are as follows:
  • 03 December 2006 - 25 March 2007
  • 28 October 2007 - 25 March 2008
  • 26 October 2008 - 29 March 2009

After this trial period ends, the Western Australia Parliament will consider extending the period further or making it permanent.

Failure to accommodate the date change might lead to inaccurate data being recorded or displayed. For more information about potential impact, refer to Possible implications if one does not apply the Daylight Saving Time fixes.

Users of Microsoft® Windows® operating environments should refer to the site Western Australian Daylight Savings Changes for Microsoft Windows for the Year 2006/2007, from the Microsoft support site.

How do I know if my systems could be affected?

All IBM® WebSphere® Studio Application Developer Integration Edition releases will be affected by this DST change. In addition, your Operating Systems might also be affected.

Use the IBM Time Zone Update Utility to update Java

Users of WebSphere Studio Application Developer Integration Edition may need to use the IBM Time Zone Update Utility (JTZU) to apply updated time zone information to their Java JREs/SDKs to prevent any runtime problems. For more information about the JTZU tool:
  1. Review the following information:
  2. Download the utility from IBM developerWorks: IBM Time Zone Update Utility for Java

  3. Run the utility.

    Important: If you run the utility in Interactive mode and you have the runtime test environment installed with WebSphere Studio Application Developer Integration Edition, remember to specify two Java installations for the utility to update (one JRE for WebSphere Studio Application Developer Integration Edition and one JRE used by the runtime environment).

The JTZU has been updated to resolve the DST change for Western Australia going into effect on 3 December 2006.

What could happen if I do not update my systems?

Any Western Australia time zone-based application that uses time will be affected.

The following typical scenarios and operations will produce incorrect results as a consequence of using the time offset by one hour.
  • Time format and display
  • Time zone name display
  • Operations that check whether a particular date is in daylight saving time
  • Computations and/or business logic based on daylight saving time
  • Any of the above that run on a system on which time is set to a time zone other than a Western Australia time zone, but does computations based on a Western Australia time zone

Change history
  • 13 December 2006: Added change history table
  • 01 December 2006: Created
 
Related information
Java DST: Known Problems and Workarounds
Daylight Saving Time Alert on ibm.com
Java Technology on IBM developerWorks
Olson Time Zone Database
IBM-wide product alerts
 
 
 

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Document information

Product categories:

Software

Business Integration and Optimization

Other Business Integration and Optimization

WebSphere Studio Application Developer Integration Edition

General

Operating system(s):

Linux, Windows

Software version:

5.1, 5.1.1

Reference #:

1250872

IBM Group:

Software Group

Modified date:

2006-12-01

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