Daylight Saving Time Help and Support Center

Help and support on how to update your Windows computer for Daylight Savings Time (DST).

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Announcement: Daylight Saving Time Begins March 11, 2012 in much of North America

This year, as noted here, DST in much of the US and Canada begins on March 11, several weeks earlier than in years prior to 2007. In 2007, most of the US and Canada "sprang forward" a few weeks earlier than in past years in accordance with the US Department of Energy's Energy Policy Act of 2005 that was passed into law. DST also ends later than it did prior to 2007, on the first Sunday of November (that is Sunday, Nov. 4, in 2012). This results in a new DST period that is approximately three to four weeks longer than in previous years.

What is Daylight Savings Time (DST)?

Daylight saving time (DST), and "Summer Time" in much of Europe, is the practice of moving local time forward one hour in the spring and backwards in the autumn. These spring and autumnal shifts to DST are different between northern and southern hemispheres. The start of DST in the northern hemisphere is usually in March or April (depending on the country/continent), and ending in October or November. In the southern hemisphere, the changes are the opposite, with DST beginning in October and ending in March or April.

What does this mean for me?

It is important that the time zone settings for your computer's system clock and your calendar programs are updated. For your home PCs the most important action you can take is to ensure you are using Windows Update. Choosing to automatically update your operating system via Windows Update will give you a seamless transition to the new Daylight Savings Time and Time Zone settings. Guidance on how to update computers and installed Microsoft products is available here.

DST Hot Topics & Latest News

Subscribe to the Microsoft Daylight Savings Time & Time Zone Blog to receive the latest updates on DST changes

Notice: 2012 DST Changes for Morocco
24-April-12

Notice: Armenia Cancels DST
23-Mar-12

Notice: Hotfix available for Chile DST change
8-Mar-12

Notice: December 2011 DST Cumulative Update is available for Windows operating systems
29-Nov-11

Notice: Ukraine and Armenia revert 2011 DST cancellation
19-Oct-11

Notice: DST Guidance for Office 365 customers made available
14-Oct-11

Advisory Notice: DST Cancellation planned for Armenia, Belarus and Ukraine
6-Oct-11

Notice: Daylight Savings Time updates for Exchange Server 2007 SP3 Available in Update Rollup 5
27-Sep-11

Announcement: Microsoft webcast on daylight saving time changes in Russia available on demand
20-Sep-11

Notice: Daylight Savings Time updates for Commerce Server 2009 and 2007 Available
19-Sep-11

Notice: Daylight Savings Time updates for SharePoint 2010 and SharePoint 2007 Available
14-Sep-11

Notice: August 2011 DST Cumulative Update is available for Windows operating systems
16-Aug-11

Notice: A hotfix is available to update Windows DST support for Egypt, Chile and Morocco
3-May-11

Notice : DST schedule updated again for Chile
31-Mar-11

Notice: a hotfix is available to update Windows DST support for (UTC +2:00) Istanbul
25-Mar-11

Notice: a hotfix is available to update Windows DST support for (UTC -4:00) Santiago
25-Mar-11

Notice : A hotfix is available to update Windows DST support for (UTC +12:00) Fiji, and (UTC -11:00) Samoa
25-Mar-11

December 2010 DST Cumulative Update for Windows operating systems
2-Dec-10

How do I update my computer?

Home Computers

The most important action you can take is to ensure you are using Windows Update. Choosing to automatically update your operating system via Windows Update will give you a seamless transition to the new Daylight Savings Time settings.
In some cases calendar based applications may also need to be updated. Guidance and details on how to update your Microsoft Calendar products is available here.
For guidance on how to update products from software vendors other that Microsoft you should refer to the software vendor's website.

Workplace Computers

If your workplace has an IT Department contact your IT Administrator.
Follow the Home Computers guidance.

IT Professional

Update all Windows operating systems on Windows Servers. The latest available updates are listed on the Microsoft Daylight SavingTime & Support Blog or the KB 914387 How to configure daylight saving time for Microsoft Windows operating systems.
Update all Windows operating systems on individual workstations. The latest available updates are listed on the Microsoft Daylight SavingTime & Support Blog or the KB 914387 How to configure daylight saving time for Microsoft Windows operating systems.
Update calendar appointments affected by the update in Exchange and Outlook. This can be completed a number of ways depending on your needs. Guidance on how to choose the right method for you is available here.
Available Updates for other Microsoft Products that are affected by DST and TimeZone changes are listed on the Available DST and TZ Updates for Microsoft Products page.

Small or Medium Business

If you have a consultant who managers your systems then Contact them to discuss the required updates for your computers, applications and network.
If you manage your own systems then refer to the IT Professional guidance.

Partners

If you are a Partner updating your own systems or assisting customers to update their systems partners should refer to the IT Professional guidance. Further support for Microsoft Partners is available through the following:

Developers

To update your code for Daylight Saving Time, visit MSDN: Visual Studio and Daylight Saving Time Change to find the correct information.

Updating Exchange and Outlook Calendars

Recommended sequence of DST update actions for Windows, Exchange and Outlook

Calendar environments have an interconnected system of applications, and each environment must be adjusted to accommodate the new DST rules. Please note that KB articles may be superseded. Please review the documentation carefully before you apply any updates.

There are many supported combinations of Exchange Servers and Outlook Clients. The approach that customers should take to update their calendaring environments is dependent on these combinations. The following table shows the high level requirements for rebasing Exchange/Outlook calendars for each of these combinations.
It is important that customers follow the guidance for each specific version of Outlook that exists in their environment. e.g. If you have an Exchange Server 2010 on premise infrastructure and both Outlook 2007 and Outlook 2010 clients, the Time Zone Data Update Tool for Microsoft Outlook must be run on all Outlook 2007 clients. Outlook 2010 clients do not require that the tool be run.

All the guidance on this page should be reviewed in order to understand the appropriate sequence of actions customers should take, including the updates that should be applied prior to rebasing calendars.

	Outlook Client Versions
Customer Environment	Outlook 2003	Outlook 2007	Outlook 2010
Exchange 2003 on premises	Exchange Calendar Tool or Time Zone Data Update Tool for Microsoft Office Outlook	Exchange Calendar Tool or Time Zone Data Update Tool for Microsoft Office Outlook	No Action Required
Exchange 2007 on premises	Exchange Calendar Tool or Time Zone Data Update Tool for Microsoft Office Outlook	Exchange Calendar Tool or Time Zone Data Update Tool for Microsoft Office Outlook	No Action Required
Exchange 2010 on premises	Time Zone Data Update Tool for Microsoft Office Outlook	Time Zone Data Update Tool for Microsoft Office Outlook	No Action Required
BPOS-S (Exchange 2007)	Time Zone Data Update Tool for Microsoft Office Outlook	Time Zone Data Update Tool for Microsoft Office Outlook	No Action Required
BPOS-S (Exchange 2010)	Time Zone Data Update Tool for Microsoft Office Outlook	Time Zone Data Update Tool for Microsoft Office Outlook	No Action Required
O365 (Exchange 2010)	Not Supported	Time Zone Data Update Tool for Microsoft Office Outlook	No Action Required

+ For small business or home computers running Windows and Outlook but not Exchange Server

+ For IT administrators who are running Microsoft Exchange Server.

+ Ensuring the Accuracy of calendar updates

The following items should be noted to help ensure maximum accuracy of calendar updates:

Rapid succession of steps is important
As mentioned earlier, it is better to run the Outlook or Exchange Time Zone Date Update Tool as soon as possible after the time that the Windows operating system time zone updates and Exchange Server updates are applied to all computers and servers. If calendar items in the extended DST period are scheduled after the operating system updates are applied but before the tool is run, they will incorrectly be moved one hour earlier. To correct such calendar items, organizers should manually update such items to help make sure that they are scheduled accurately for themselves and all invitees.
All connected devices must be updated
Even if you correctly update your computer, when you view your calendar from a non-updated mobile device running Windows Mobile, your calendar items during the extended DST period will be shifted by one hour. Items created on a Windows Mobile device that does not have the update applied must be updated on your computer by running the Outlook Time Zone Data Update Tool again.
If other users have not updated their calendars, it will affect other users
The Outlook Time Zone Data Update Tool only updates meetings for which the user is the organizer and then automatically sends updates for those meetings to attendees. So, meetings that you are invited to but did not organize will not be updated until the organizer updates the meeting and an update is sent to you through Outlook. You must accept these updates in Outlook to correct your calendar on these meetings. Additionally, meetings created by a delegate on your behalf from a computer that does not have the update installed must be updated on your computer by running the Outlook Time Zone Data Update Tool again.
Users have the option to accept the change
The tool will prompt meeting invitees about whether to change meeting times. The invitees must accept the updated meeting requests for the changes to be accurately reflected in their calendars. If the tool incorrectly prompts a user to move a meeting, the user has the option of un-selecting those meetings from the list and they will not be moved.
Special considerations for recurring calendar items
Recurring calendar items created by Outlook Web Access will not be updated correctly if the Exchange Server computer is updated before the desktop client that is running the update tool (applies to both Outlook and Exchange tools). Users who create recurring calendar items must be aware of this and carefully review their calendar after the update is complete, regardless of which sequence of steps were followed in their Exchange environment.
Update resource mailbox calendars
Follow the procedures listed here to correctly update calendars in resource mailboxes.

+ Implications of the 4 different approaches to updating Calendars.

The IT administrator has one of four alternatives (pros and cons of each alternative are described later in this article):

Push out the Outlook Time Zone Data Update Tool to the clients and let the users update their own mailboxes.
Run the Exchange Calendar Update tool against all affected users, servers, or both.
Do not run the Exchange Calendar Update Tool or the Outlook Time Zone Data Update Tool. Ask users to examine their calendars and rebook as necessary.
Run the Exchange Calendar Update tool against all affected users, servers, or both, but only modify recurring appointments. Then ask users to rebook single instance appointments that fall into the extended DST period or ask them to run the Outlook Time Zone Data Update Tool.
IT administrators should fully understand and analyze the implications of the four alternatives for deploying the Outlook or the Exchange version of the tool. The respective pros and cons of each scenario are described below. For more information, please refer to Microsoft Knowledge Base articles 931667 and 941018.

Run the Exchange Time Zone Date Update Tool against all Exchange Servers.
- Pros: Streamlined experience for users.
- Cons: Potential risks to IT environment of running Exchange Time Zone Update Tool. More likely to incorrectly modify single-instance appointments.

Push out the Outlook Time Zone Data Update Tool to the clients and let the users update their own mailboxes.
- Pros: Less likely to incorrectly modify single-instance appointments. Avoid potential risks to IT environment of running the Exchange Time Zone Update Tool.
- Cons: Difficult to make sure that all users run this tool correctly and in a timely manner. Educational effort is needed to lessen confusion for users.

Run the Exchange Time Zone Date Update Tool against all Exchange Servers but only modify recurring appointments. Then ask users to rebook single instance appointments that fall into the affected period or ask them to run the Outlook Time Zone Data Update Tool.
- Pros: Less likely to incorrectly modify single-instance appointments.
- Cons: Potential risks of both the Exchange and Outlook Time Zone Update Tools; all users will have to run the tool and risks of running the Exchange Time Zone Date Update Tool still exist.

Do not run the Exchange Time Zone Update Tool or the Outlook Time Zone Update Tool. Ask users to examine their calendars and rebook as necessary.
- Pros: Same as alternative #1-less likely to incorrectly modify single-instance appointments. Avoid potential risks to IT environment of running the Exchange Time Zone Update Tool.
- Cons: Unless all users rebook all appointments, some calendar items will be one hour off in extended DST period.

If the steps above are not followed correctly, the following actions apply
- If Outlook Time Zone Data Update Tool is run before Windows operating systems updates are applied to all computers
  If you run the Outlook Time Zone Data Update Tool before the system has the Windows operating system update, the tool will not list any calendar items to update because it will not yet recognize the new DST rules.
- If the Outlook Time Zone Data Update Tool is run multiple times
  Generally, it is safe to run the tool multiple times because the tool will see all the appointments that were updated and ignore them. That said, if the user explicitly instructs the tool to ignore a set of appointments (for example, single instance appointments that are targeted at a different time zone or that the user created after updating time zone rules but before they run the time zone update tool) then the tool will continue to list those appointments in future runs and the user will have to explicitly ignore those appointments again. Similarly, it is safe to run the Outlook Time Zone Data Update Tool after the Exchange Time Zone Date Update Tool has been run.

Available DST and TZ Updates for Microsoft Products

List of products and services affected by daylight saving time

Product Family	Update Available
Windows Server	Windows Server 2008 R2 Windows Server 2008 Windows Server 2003
Windows Client	Windows 7 Windows Vista SP2 Windows XP SP3
Exchange Server	Exchange Server 2010 SP1 Exchange Server 2007 SP3 Exchange Server 2003 SP2 Exchange Server 2003 MAPI CDO 1.2.1 and CDO 1.2.1 Exchange Server 2003 Lotus Notes Connector Exchange 2000 Conferencing Server
Outlook	Outlook 2010 Outlook 2007 SP2 Outlook 2003 SP3
Office 365	Office 365
Commerce Server	Commerce Server 2007 and 2009
Windows SharePoint Services	O365 SharePoint Online Windows SharePoint 2010 Windows SharePoint Services 3.0 SP2
SQL Server Notification Services	SQL Server 2005 Notification Services SQL Server 2000 Notification Services
Groove	Office Groove 2007
Dynamics CRM	Dynamics CRM 2011 Dynamics CRM 4.0 Dynamics CRM 3.0
Windows Mobile and Windows Phone	Windows Mobile 6.x Windows Phone 7
Windows CE	Windows CE-based devices
Entourage	Entourage Outlook for MAC
Windows Services For Unix (SFU) and Subsystem for UNIX-based Applications (SUA)	Windows Services For Unix (SFU) 3.5 Windows Services For Unix (SFU) 3.0 SUA in Windows Server 2003 R2 SUA in Windows Vista

Detailed update information and downloads

Windows Server and Client

Windows 7, Windows Server 2008 R2, Windows Server 2008, Windows Vista SP2, Windows Server2003 SP2, Windows XP SP3

For the latest DST updates for all supported versions of Windows refer to KB 914387 How to configure daylight saving time for Microsoft Windows operating systems.

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Exchange Server

Exchange Server 2010 Service Pack 1

Ensure you have the latest Service Pack for Exchange Server 2010, install the Windows cumulative update or Hotfix
Then Install the Exchange 2010 update for Outlook Web Apps (OWA) see KB Article 2627769 Some time zones in OWA are not synchronized with Windows in an Exchange Server 2010 environment.
You should then refer to the Updating Exchange and Outlook Calendars page describing how to update an Exchange environment.

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Exchange Server 2007 Service Pack 3

Ensure you have the latest Service Pack for Exchange Server 2007, install the Windows cumulative update or Hotfix and then install the Exchange 2007 DST Update. You should then refer to the Updating Exchange and Outlook Calendars page describing how to update Exchange Server 2003 in response to a DST change.
The Exchange 2007 SP3 DST Update for August 2011 has been released as a part of Rollup 5. See KB 2602324 Description of Update Rollup 5 for Exchange Server 2007 Service Pack 3 for more information.

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Exchange Server 2003 Service Pack 2

Ensure you have the latest Service Pack for Exchange Server 2003, install the Windows cumulative update.
Then install the Exchange 2003 DST Update. See KB Article October 2011 cumulative DST update for Exchange Server 2003 SP2.
You should then refer to the Updating Exchange and Outlook Calendars page describing how to update Exchange Server 2003 in response to a DST change.

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Exchange Server 2003 MAPI CDO 1.2.1 and CDO 1.2.1

Install the Windows cumulative update or Hotfix and then install the appropriate DST updates to all Exchanges Servers
Uninstall previous versions of the MAPI CDO 1.2.1 and CDO 1.2.1 components from all servers that have them installed.
Apply the latest MAPI CDO 1.2.1 and CDO 1.2.1 components see KB Article Exchange Server 2003 MAPI CDO 1.2.1 and CDO 1.2.1 have been updated

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Exchange Server 2003 Lotus Notes Connector

KB 978385 December 2009 cumulative DST update for Exchange Server 2003 Connector for Lotus Notes, Exchange Server 2003 Calendar Connector for Lotus Notes, and Exchange Server 2003 Migration Wizard for Lotus Notes

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Exchange 2000 Conferencing Server

KB 932658 Information about the changes to daylight saving time in 2007 for Exchange 2000 Conferencing Server
If you are working with a Technical Account Manager (TAM), contact your TAM about creating a hotfix request for Exchange SE to obtain the patch.

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Outlook

Outlook 2010

In Outlook, you can display two separate time zones in the Calendar. This allows you to see your local time zone and the time zone of a city that you often travel to. When you travel to that other time zone, you can use the Swap Time Zones option to change the position of the time bar in the Calendar. Using the Swap Time Zones option in Outlook 2010 results in unexpected behavior. This issue is fixed in Outlook 2010 SP1 and Microsoft recommends that customers download and install this service pack to avoid this problem. Customer who have not yet installed Outlook 2010 SP1 can find a work around for this issue in Outlook 2010 in the KB Article 2507003 Using Outlook 2010 Swap Time Zones to switch from non-DST to DST Time Zone does not enable DST in Windows.

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Outlook 2007 Service Pack 2

KB 931667 How to address time zone changes by using the Time Zone Data Update Tool for Microsoft Office Outlook

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Outlook 2003 Service Pack 3

KB 931667 How to address time zone changes by using the Time Zone Data Update Tool for Microsoft Office Outlook

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Office 365

Guidance for Professionals and Small Businesses: Prepare for a change to your time zone.
Guidance for Midsize Businesses and Enterprise: Prepare for a change to your time zone.

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Windows SharePoint Services

Office 365 SharePoint Online

See Release Note Displayed local time and time zones may not be not correct in SharePoint Online.

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Windows SharePoint 2010

KB 2553050 Description of the SharePoint Foundation 2010 cumulative update package (SharePoint Foundation server-package): August 30, 2011

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Windows SharePoint Services 3.0 Service Pack 2

KB 888253 How to manually update the DST period for a time zone definition in Windows SharePoint Services by modifying the Timezone.xml file
KB 2553019 Description of the Windows SharePoint Services 3.0 hotfix package (Sts-x-none.msp): August 30, 2011

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Commerce Server

Commerce Server 2007 and 2009

KB 932395 How to update Commerce Server 2007 and Commerce Server 2009 for the changes to daylight saving time

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SQL Server Notification Services

SQL Server 2005 Notification Services

KB 974412 DST time zone update for SQL Server 2005 Notification Services and for SQL Server 2000 Notification Services

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SQL Server 2000 Notification Services

KB 974412 DST time zone update for SQL Server 2005 Notification Services and for SQL Server 2000 Notification Services

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Groove

Important information for users who have Groove workspaces: After this change, users should communicate to verify and adjust start times and end times of Groove Meetings tool meetings and Groove Calendar tool appointments. Also, users should be aware that time stamps may appear incorrectly in other Groove tools such as Discussion, Forms, Chat, and messaging. For more guidance on resolving or working around these problems, refer to the DST KB articles listed below for your specific version of Groove.

Office Groove 2007

KB 932607 How to correct issues that are caused by daylight saving time changes in 2007 and that affect the Calendar tool in Groove 2007 and in earlier versions of Groove

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Microsoft Dynamics CRM

Dynamics CRM 2011

KB 2555051 Microsoft Dynamics CRM 2011 updates and hotfixes

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Dynamics CRM 4.0

KB 949256 Microsoft Dynamics CRM 4.0 updates and hotfixes

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Dynamics CRM 3.0

KB 908951 Microsoft Dynamics CRM 3.0 updates and hotfixes

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Windows Mobile and Windows Phone

Windows Mobile 6.x

For information about updating Windows Mobile 6.x refer to KB 2526756

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Windows Phone 7

All Windows Phone 7 updates are published by Microsoft and notifications are sent to your phone when they are available. Installing these updates will ensure you have the latest changes for DST.

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Windows CE

Windows CE-based devices

All updates for Windows CE are available from the Windows Embedded Download Site

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Entourage and Outlook for Mac

Entourage and Outlook for Mac 2011

To ensure you have the latest updates for Daylight Savings Time and Time Zone changes you can do one of the following:

Select Check for updates in the Office for Mac 2011 Help menu. This will automatically search for the latest available updates.
Visit the Download Page on the Office for Mac website to find the latest available updates

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Windows Services For Unix (SFU) and Subsystem for UNIX-based Applications (SUA)

Windows Services For Unix (SFU) 3.5, Windows Services For Unix (SFU) 3.0, SUA in Windows Server 2003 R2, and SUA in Windows Vista

KB 977615 A hotfix is available for Windows Services for UNIX and for Subsystem for UNIX-based Applications to incorporate a cumulative DST update for December 2009

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Microsoft Support Policy for Daylight Saving Time or Time Zone Changes

Daylight Savings Time (DST) and Time Zone (TZ) updates are important because unless they are applied, the time zone setting for a computer’s clock and calendar, as well as the recorded and reported timestamps may be incorrect. The Microsoft Support Lifecycle policy enables all Microsoft customers to obtain these broadly distributed DST or TZ updates and help ensure their computer’s time information is accurate.

General distribution DST or TZ releases
These are intended for broad consumption and made available via Microsoft and/or Windows Update two times every calendar year in the northern hemisphere's fall and winter. These updates are available at no charge for products in the Mainstream or Extended Support Phase of the Support Lifecycle.
Out-of-cycle DST or TZ releases
DST or TZ updates outside of the general distribution will be considered on a case by case basis. Customers may contact their Technical Account Manager or Microsoft Account Representative for more information.

The Microsoft Support Lifecycle (MSL) policy provides transparent, predictable information regarding the support lifecycle of Microsoft products. More information is available on the MSL web site: http://support.microsoft.com/lifecycle.

Microsoft Policy in Response to DST/TZ Requests

Microsoft Windows has established an annual update schedule for daylight saving time (DST) and time zone (TZ) releases. Most Windows-based applications (and some services) reference the underlying operating system for DST/TZ information, but some applications and services do not. Hence many of our product teams also follow an annual product update cadence such a Windows, with provisions for semi-annual cumulative updates as needed. For each update release, Microsoft accepts change requests up to a few months (generally four to six) prior to the release date. The Windows Release schedule provides a regular cadence for other product groups to follow.

Following the Windows regular cadence for publishing newly legislated DST rules and TZ updates, cumulative DST and Time Zone updates are scheduled for release each December (to the Microsoft Download Center and to Windows Update) for the coming calendar year as long as there are time zones affected. When needed, Microsoft product groups may also provide a semi-annual update in the August/September timeframe. The product group will also publish the new or modified TimeZoneInformation (TZI) keys in an update to Microsoft KB article 914387 for IT professionals and systems administrators who may need that information. Microsoft hopes that this will provide a more predictable way for customers to anticipate and plan for our scheduled product updates as they are published.

Recommendations

In order to achieve more seamless transitions to new DST and time zone policies, Microsoft requests that governments provide the following:

Ample advance notice (1 year or more) of the planned change.
Official published confirmation of planned changes to DST or time zones.
Concentrated efforts on promoting the change to the affected citizens.

Customer requests and the Microsoft DST/TZ Support Policy

Change Type

Change Details

Solution Recommendations

Solution

Change to a region's TZ rules

New DST or TZ change matches another TZs exact parameters.

There will be no product updates for this type of request. The recommendation is for the country or region requesting this change to use the existing time zone that matches the same parameters

Guidance

Changes to existing time zones

Modifying the DST start and end times and dates of a time zone (or several time zones that affect a particular country or region) with no time zone that matches the exact parameters.

-or-

Modify an existing time zone by change the DST rule or adding and removing DST to a time zone.

-or-

Modifying the time bias to an existing time zone.

In this scenario, if there is no existing time zone that matches the exact requirements of the country or region, the recommendation is to schedule the request to be included in the next DST/TZ cadence release.

Microsoft’s ability to meet any country or region’s needs with this official DST/TZ policy, depends greatly on the regions providing sufficient time (6 months or more) of notification prior to the change taking effect.

Cadence Update

-and-

Guidance

New Time Zones

A subset of the region that shares a time zone makes a change to its DST requirements or changes the time bias of its time zone. A new time zone is required for the subset of users changing requirements because the existing time zone is needed as is for the rest of its users.

This scenario requires a new time zone. The recommendation is to schedule the request to be included in the next DST/TZ cadence release.
Microsoft’s ability to meet any country or region’s needs with this official DST/TZ policy , depends greatly on the regions providing sufficient time (6 months or more) of notification prior to the change taking effect.

Cadence Update

-and-

Guidance

On occasion, when there are extreme circumstances that require a change to a time zone, Microsoft may make an effort to provide a solution to the customers in the impacted regions through an Out-of-Band (OOB) Release. Any such package may include a Windows hot fix and a documented Outlook solution through the TZMOVE tool. Where a temporary workaround for customers exists Microsoft may recommend using the workaround until the Cadence Release is made available.

Other resources

DST Webcasts

When DST and Timezone changes occur Microsoft often produces webcasts to support customers. These webcasts include the guidance provided on this site and the Q&A sessions with customers. The DST Webcasts page will continue to be updated as new webcasts are available.

Microsoft IT deployment guidance

The following guidance documents from the Microsoft IT Department cover a wide range of enterprise scenarios for DST change management. Guidance from both 2011 and 2007 is available all of which remains highly relevant to the broad range of customers and partners using different versions of Microsoft Products in their environments.

MSIT 2011 Guidance
The following documents provide information about Microsoft’s approach to rolling out the DST changes for Russia across the Microsoft enterprise.

XPS format:
To view these documents on computers that do not have Vista or Internet Explorer 7 installed, visit the following Web site to download and install the free XPS viewer: http://www.microsoft.com/whdc/xps/viewxps.mspx
MSIT DST Assessment Checklist
MSIT Enterprise Response Plan
MSIT Russia DST Awareness Communication

PDF format:
To view these documents on computers that do not have the Adobe reader software installed, visit the following Web site to download and install the free PDF viewer: http://www.adobe.com/products/acrobat/readstep2.html
MSIT DST Assessment Checklist
MSIT Enterprise Response Plan
MSIT Russia DST Awareness Communication

MSIT 2007 Guidance
The following links provide information that Microsoft learned in deploying daylight saving time changes in the enterprise during the 2007 DST changes in the United States. This information may help your organization in preparing for changes.

XPS format:
To view these documents on computers that do not have Vista or Internet Explorer 7 installed, visit the following Web site to download and install the free XPS viewer: http://www.microsoft.com/whdc/xps/viewxps.mspx
MSIT DST Assessment Checklist
MSIT DST Enterprise Response Plan
MSIT DST Patching Overview
MSIT DST Exchange TZ Update Tool Guidance
MSIT DST Outlook TZ Update Package Guidance
MSIT DST Exchange Calendar Update Tool Awareness Communication
MSIT DST Outlook Time Zone Data Update Tool Awareness Communication
MSIT DST Windows Mobile Smartphone or Pocket PC user Awareness Communication

PDF format:
To view these documents on computers that do not have the Adobe reader software installed, visit the following Web site to download and install the free PDF viewer: http://www.adobe.com/products/acrobat/readstep2.html
MSIT DST Assessment Checklist
MSIT DST Enterprise Response Plan
MSIT DST Patching Overview
MSIT DST Exchange TZ Update Tool Guidance
MSIT DST Outlook TZ Update Package Guidance
MSIT DST Exchange Calendar Update Tool Awareness Communication
MSIT DST Outlook Time Zone Data Update Tool Awareness Communication
Updating resource mailboxes for daylight saving time 2007

DST Blogs

There are a number of useful blogs to keep customers up to date on DST\TZ changes in their region.

3rd Party Product updates

Blackberry/RIM
The latest available updates for BlackBerry can be found by searching the BlackBerry Knowledge Base
http://btsc.webapps.blackberry.com/btsc/microsites/microsite.do
Enter the Search term “daylight savings time” and Sort By: Publication Date to find the latest information.

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Last Review : April 24, 2012

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Daylight Saving Time Help and Support Center

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DST Hot Topics & Latest News

Subscribe to the Microsoft Daylight Savings Time & Time Zone Blog to receive the latest updates on DST changes

How do I update my computer?

Home Computers

Workplace Computers

IT Professional

Small or Medium Business

Partners

Developers

Updating Exchange and Outlook Calendars

Recommended sequence of DST update actions for Windows, Exchange and Outlook

+ For small business or home computers running Windows and Outlook but not Exchange Server

+ For IT administrators who are running Microsoft Exchange Server.

+ Ensuring the Accuracy of calendar updates

+ Implications of the 4 different approaches to updating Calendars.

Available DST and TZ Updates for Microsoft Products

List of products and services affected by daylight saving time

Detailed update information and downloads

Microsoft Support Policy for Daylight Saving Time or Time Zone Changes

Microsoft Support Policy for Daylight Saving Time or Time Zone Changes

Microsoft Policy in Response to DST/TZ Requests

Other resources

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