New Zealand has extended Daylight Saving Time (DST).
DST will start one week earlier than usual, on 30 September 2007, instead of the first Sunday in October. It will end two weeks later, on 6 April 2008, instead of the third Sunday in March. Systems and applications that process dates and times will be affected by this change.
If no action is taken, computers and applications that use local time will be off by one hour for one week the first week in October, the last two weeks in March, and the first week in April.
How do I know if my systems could be affected?
Your systems are likely to be affected by this change even if you are operating outside of New Zealand. Date and time processing functions in systems and applications in New Zealand are affected. Systems and applications in countries not implementing the DST change could be impacted if they support users, transactions or applications originating in New Zealand. For example, scheduling or synchronizing problems may arise where systems make or check date or time stamps relating to transactions in other countries, or there may be difficulty in scheduling meetings.
What will happen if I fail to update my systems?
Systems or applications that rely on date or time processing functions could make incorrect calculations. Calendar, scheduling, or synchronizing problems could arise where systems use date or time stamps, or if dates or times are processed or manipulated in any way.
In short, if your system makes date or time calculations, you may experience calculation errors.
IBM Tivoli/Netcool Webtop 1.3, 2.0 and 2.1 Users
In order to ensure proper Date and Time calculations for IBM Tivoli Netcool/Webtop, all customers must take the following steps:
Like most software, Netcool/Webtop relies upon 2 main systems to provide time and date services:
· The operating system runtime environment
· The JAVA Runtime Environment (JRE)
Fixes for the operating system and JAVA Runtime Environment (JRE) must be applied separately. This information and other in this document apply to both: server environment running Netcool/Webtop as well as web browser environment running Netcool/Webtop Java applets.
Fixes for the Operating System
Please consult your operating system vendor for the required updates.
Fixes for the JAVA Runtime Environment (JRE)
The IBM® Centre for Java™ Technology Development has produced a utility you can use to apply changes to your Java environment for Daylight Saving Time (DST) changes taking place in New Zealand.
Customers using IBM SDK/JRE (note: Customers using Netcool/Webtop on AIX platform) can take the following action:
The IBM Time Zone Update Utility for Java (JTZU) is used to apply preventive service to IBM products that embed an IBM Java SDK/JRE.
Follow this link to review and use the JTZU:
Customers using non IBM JVM should refer to JVM vendor pages:
For SDK/JRE on HP platform, the main DST page describing where to find and how to apply fixes is here: http://www.hp.com/products1/unix/java/DST-US.html (note: Customers using Netcool/Webtop on HP-UX platform)
For Sun SDK/JRE the main DST page describing where to find and how to apply fixes is here:
http://java.sun.com/javase/timezones (note: Customers using Netcool/Webtop on all other platforms except AIX and HP-UX)
Where can I get more information?
Consolidated information on the impact of the New Zealand DST changes on IBM products is available at the following web site: http://www-306.ibm.com/software/support/tz.html
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