Office Outlook Calendar
Impact of Daylight Saving Changes on Office Outlook Calendar Items
Updated 28th September 2007
Microsoft Outlook obtains daylight saving information from the host Windows operating system to determine the correct start time for future appointments. Consequently, it is important that Windows is updated to reflect any changes in daylight saving, including the introduction of daylight savings to a particular timezone for the first time.
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.
Office Outlook 2000, 2002, 2003 & 2007 Calendar Update Tool
Use of the Time Zone Data Update Tool for Microsoft Office Outlook
KB931667 is available to adjust calendar items after a Windows time zone update is applied. The tool may be used where Microsoft Office Outlook is used either standalone or in a Microsoft Exchange Server environment.
Exchange Calendar Update Tool
The Exchange Calendar Update Tool, described in KB941018 is recommended for enterprise environments to automate the adjustment of calendar items in a Microsoft Exchange Server environment.
Manual Adjustment of Appointments
For older versions of Microsoft Outlook or if tools are not available for automatic adjustment, appointments which fall between the old and new daylight saving transition times can be checked and adjusted manually. It is suggested that a hard copy of the calendar for the entire new daylight saving period is made prior to applying a Windows time zone update so that the original times for appointments can be checked.