Skip to main content

IT Professional Information

New Zealand 2007 Daylight Saving Changes

Updated 19th March 2008



Important - The definition of the New Zealand time zone differs between Windows Vista and down-level Windows OSes. Specifically, the difference between OSes relates to which time zone rule each OS returns as the currently active rule; Vista returns the 2007 rule while other Windows OSes return the 2008 rule. Please click here for more information.

The New Zealand Daylight Savings Changes Guidance Document can be found here (XPS and PDF versions are available).

To find copies of the recent Daylight Savings presentations please click here.

The New Zealand daylight savings blog is constantly being updated with information as it comes to hand. Please ensure you are keeping your eyes on it.

Syndication subscriptions:




In April 2007 the New Zealand Government announced an update to the Time Act of 1974. This update changes the dates of both the start and end of daylight saving time (DST). When this law goes into effect in 2007, daylight savings time will start one week earlier (2:00 A.M. on the 30th September 2007) and will end two weeks later (3:00 A.M. on 6th April 2008) than past years.

A number of Microsoft® products require updates for the new daylight saving times. Information on these product updates appears below.

If you have any questions about the updates you can contact Microsoft as follows:

A summary of the status of product updates appears in the table below. Notes regarding specific updates appear below the table.


Mainstream Supported Products

WindowsVista, XP (SP2), Server 2003 SP1 & SP2, (SBS) 2003Available KB933360
Windows Mobile Additional Windows Mobile information can be found here
6.0 Standard, Professional and ClassicAvailable KB941898
5.0 Smartphone, PPC phone edition and PPCAvailable KB941898
ExchangeServer 2007 (CDO update only)Available KB940006

Server 2003 (SP2) CDO update only) see note around SBSAvailable KB926666

Notes ConnectorAvailable Download
Outlook2007 (CDO update only)Available KB939596
2003 (CDO update only)Available KB947407
2000 (CDO update only)AvailableKB 943879 *
EHS is required
SharepointWSS V2 / SPS 2003 (SP2)AvailableKB941412

WSS V3 / MOSS 2007AvailableKB941422

WSS V3 / MOSS 2007 - Timer ServiceAvailable KB938663
Dynamics CRM3.0Available KB937667
SQL Notification servicesServer 2000 Notification Services 2.0

Server 2000 Notification Services 2.0 Service Pack 1 (SP1)

Server 2005 Notification Services

Server 2005 Notification Services Service Pack 1 (SP1)

Server 2005 Notification Services Service Pack 2 (SP2)


*EHS=Extended Hotfix Support; CSA=Custom Support Agreement; TBC=To Be Confirmed; WSS=Windows SharePoint Services; MOSS=Microsoft Office SharePoint Services

Manually Updating Windows

If you are unable to obtain an update for your version of Microsoft Windows, you can manually update the Windows registry to reflect the new daylight saving times. Refer to the Manual Updates page for more information.

Manually Updating Office Outlook Calendar Items

To investigate how to you can manually update Office Calendar item to reflect the new daylight saving times. Refer to the Calendar Updates page for more information.

Product Notes:

Windows® Vista; XP; Server 2003

KB933360 is a cumulative time zone update and supersedes all previous time zone updates, including KB931836 and KB929120. KB933360 will be distributed via Windows Update as a high priority update on 28th August 2007 (US Pacific Time).

Windows Small Business Server 2003

Apply KB933360 to Small Business Server 2003 to ensure correct operation of the system clock during the WA daylight saving trial. If you use the Exchange Server component of Small Business Server, you should also apply the Microsoft Exchange Server updates after installing Exchange Server 2003 Service Pack 2.

Microsoft Visual Studio

Developers who use the .NET Framework may find their applications affected if the application uses the time zone information for historical purposes or if they have derived custom classes from System. TimeZone to provide custom time zone information. The standard System.TimeZone class provides a managed wrapper for the underlying Windows Operating System time zone functions. Refer to Visual Studio and Daylight Saving Time Change for more information.

Microsoft Office Outlook®

Updates for Microsoft Outlook are only required if applications which use the CDO interface to access time zone information are installed on the client PC. Installation of the Outlook updates should only be performed if problems are observed subsequent to installation of the server update. Note that for Outlook 2007 and Exchange Server 2007, CDO is supplied as a separate download. To obtain the latest version of CDO, go to and search for 'CDO'.