Microsoft Daylight Saving Time & Time Zone Blog
This is the blog maintained by staff at Microsoft to provide general information, announcements and provide answers to Frequently Asked Questions (FAQs) related to daylight saving time (DST) and time zone (TZ) changes around the world.* Important Notice
Is the tzmove.exe file that is 304kb the right one?
Q: I've put the TZMOVE.EXE and .dll into the same directory as the msextmz.exe files and changed the...
Author: atsim1 Date: 02/28/2007
Does the new version of the rebasing tool handle not updating any appointments created after the client OS patch was deployed?
Q: Does the new version of the rebasing tool handle not updating any appointments created after the...
Author: atsim1 Date: 02/28/2007
What will happen if a user has two computers and I run the TZMove tool twice on their account?
Q: I have a question about users who have more than one computer, say a laptop and a desktop. I...
Author: atsim1 Date: 02/28/2007
If I was not the originator of a meeting, and I am in the Eastern Time Zone, will rebasing the calendar impact meetings?
Q: If I was not the originator of a meeting, and I am in the Eastern Time Zone, will rebasing the...
Author: atsim1 Date: 02/28/2007
Will the new tools allow the rebasing of these public folders to be automated as is the process for user mailboxes with the exchange tool?
Q: We have over 300 direct book public folder calendars that are in heavy use. Will the new tools...
Author: atsim1 Date: 02/28/2007
What does REBASE mean?
Q: What does REBASE mean?A: Applying the DST2007 update to the Windows OS will impact...
Author: atsim1 Date: 02/28/2007
Is there a new version of the Outlook tool?
Q: There is some confusion as to whether there will be a new version of the Outlook tool – is...
Author: atsim1 Date: 02/28/2007
You stated that Outlook is impacted, but my reading says the server gets updated. Is this right?
Q: You stated that Outlook is impacted, but from what I read on the page you mentioned, it seems...
Author: atsim1 Date: 02/28/2007
Is there a link for the Outlook DST update tool?
Q: Is there a link for the Outlook DST update tool?A: The Outlook tool is available at...
Author: atsim1 Date: 02/28/2007
Is Outlook is affected by the daylight saving time changes?
Q: Is Outlook is affected by the daylight saving time changes? How so? I don't see that on your...
Author: atsim1 Date: 02/28/2007
Where can I get the GetDynamicTimeZoneInformation implementation for XP to fix some bugs I have?
Q: Where can I get the GetDynamicTimeZoneInformation implementation for XP to fix some bugs I...
Author: atsim1 Date: 02/28/2007
Can you tell me if the original SMS 2003 scan tools will also detect the DST patch?
Q: We are running SMS 2003 sp1 with the original Security Update Scan Tool. I was said in...
Author: atsim1 Date: 02/28/2007
I run a WSUS server pushing out updates including the daylight savings update. to all computers on my network. How come some updates are installed and some aren't?
Q: I run a WSUS server pushing out updates including the daylight savings update. to all computers...
Author: atsim1 Date: 02/28/2007
Prior to Windows Vista, Windows offered support for only a single set of adjustment rules.
Q: Prior to Windows Vista, Windows offered support for only a single set of adjustment rules. This...
Author: atsim1 Date: 02/28/2007
Does the New daylight Saving Time affects Mexico?
Q: Does the New daylight Saving Time affects Mexico?A: As of today Mexico is not participating in...
Author: atsim1 Date: 02/28/2007
have three items on my calendar for 3/12. One is a meeting where I am the organizer, one is a meeting where I am an attendee, one is an appointment with no attendees. What happens when I run the DST patch and the rebase tool?
Q: I have three items on my calendar for 3/12. One is a meeting where I am the organizer, one is a...
Author: atsim1 Date: 02/28/2007
Is there a way to get a patch for the outdated OS, and just how nasty would the cost be?
Q: I have 6 windows NT Server 4 machines on the network at schools, and 3 in the central office. All...
Author: atsim1 Date: 02/28/2007
I'd like to run a scenario of our push to Windows 2000. I had patched my XP SP2 workstation and exported the 2 keys (tzinfo and timezones). With those 2 keys, I've been applying these on to Windows 2000. Is this a correct procedure?
Q: I'd like to run a scenario of our push to Windows 2000. I had patched my XP SP2 workstation and...
Author: atsim1 Date: 02/28/2007
What happens to machines that missed the OS update and get it after rebase tool is run?
Q: We sent out an SMS package already with the client os update and set it to run Friday at 12:01am....
Author: atsim1 Date: 02/28/2007
Will the client OS update move meetings if that user is not the organizer?
Q: Will the client OS update move meetings if that user is not the organizer?A: Installing the DST...
Author: atsim1 Date: 02/28/2007
We have updated our computer operating systems with the DST fix in the past and recently found we should have ran the Outlook or Exchange tool to correct Calendars soon after the computers were updated. What do we do?
Q: We have updated our computer operating systems with the DST fix in the past and recently found we...
Author: atsim1 Date: 02/28/2007
What is the guidance for developers to implement the fix for historical data with OS prior to Vista?
Q: What is the guidance for developers to implement the fix for historical data with OS prior to...
Author: atsim1 Date: 02/28/2007
What happens if the user's OS is updated before the OS on the Exchange server?
Q: What happens if the user's OS is updated before the OS on the Exchange server?A: The user will...
Author: atsim1 Date: 02/28/2007
If you've run the OS DST update and have appointments already scheduled in the extended DST period that were created before the OS update was run, can you just open each of those calendar items - set the correct time and save it?
Q: If you've run the OS DST update and have appointments already scheduled in the extended DST...
Author: atsim1 Date: 02/28/2007
Due to upgrade plans, we do not wish to patch. What effect will being unpatched have?
Q: We're running Server 2000/Exchange 2000 with plans to upgrade this year. We don’t want to upgrade...
Author: atsim1 Date: 02/28/2007
SMS says the patch is run, but it doesn't seem like is has. How do we confirm it has run?
Q: We rolled the DST patch from the SUS in SMS, and got confirmation that it ran. However, when I go...
Author: atsim1 Date: 02/28/2007
I have patched but an appointment in my calendar shows the wrong time. Why?
Q: I patched my Windows XP SP2 PC. I have Exchange 2003 SP2 on my network. I did not patch Exchange,...
Author: atsim1 Date: 02/28/2007
We deployed client OS patches about 2 weeks ago but have not rebased the Exchange servers yet. Should we wait for the new version?
Q: 2 - questions - We deployed client OS patches about 2 weeks ago but have not rebased the Exchange...
Author: atsim1 Date: 02/28/2007
What happens when a server has the patch and the workstation doesn't?
Q: what happens post 2am on 3/11 if domain controller server has O/S patch but a workstation O/S...
Author: atsim1 Date: 02/28/2007
How can I remove the DST2007 patch and go back to the old DST definition?
Q: How can I remove the DST2007 patch and go back to the old DST definition? Thanks.A: If you...
Author: atsim1 Date: 02/28/2007
We deployed KB 928388 before 931836. Do wee need to deploy KB 931836?
Q: We deployed 928388 to the desktops before the latest update for the OS with the new time zones...
Author: atsim1 Date: 02/28/2007
Are there recommendations or guidance for Windows Mobile users who sync to their pc's on how to install the DST 2007 Update Tool if they do not have local admin rights?
Q: Is there any recommendations or guidance for Windows Mobile users who sync to their pc's on how...
Author: atsim1 Date: 02/28/2007
Microsoft has updates for Windows XP. Once I apply that update, am I done
Q: I understand that Microsoft has updates for Windows XP. Once I apply that update, am I done? Do I...
Author: atsim1 Date: 02/28/2007
How do I know if the new daylight savings time update has been applied?
Q: How do I know if the new daylight savings time update has been applied? Do I have to install a...
Author: atsim1 Date: 02/28/2007
What do we do about appointments scheduled after client OS patch, when we run the Exchange tool?
Q: What do we do about appointments scheduled after client OS patch, when we run the Exchange tool?...
Author: atsim1 Date: 02/28/2007
The checkbox for "Automatically adjust clock for daylight saving time" is not shown at the dialog box "Date Time Properties" with my XP SP2 machine. How can I fix it?
Q: The checkbox for "Automatically adjust clock for daylight saving time" is not shown at the dialog...
Author: atsim1 Date: 02/28/2007
I changed my PC time to 1:59 on 3/11 and let it roll to 3:00am. The appointment is still fine (correct time). Why do I need to run the Exchange or Outlook tool?
Q: I changed my PC time to 1:59 on 3/11 and let it roll to 3:00am. The appointment is still fine...
Author: atsim1 Date: 02/28/2007
I was planning on doing the OS patches and the exchange CDO patch tomorrow and sending out the workstation Windows OS patch to the users via WUS after I'm done with the servers. Any problem with this?
Q: I am in Arizona. The Enterprise is on the Arizona TZ. I was planning on doing the OS patches and...
Author: atsim1 Date: 02/28/2007
Why are the updates for Windows coming out so late?
Q: It seems like the updates are coming out kinda late for Windows. I found that my computer was...
Author: atsim1 Date: 02/28/2007
The displayed timestamps in some folders, document properties (like creation or last modified times) from previous years will display one hour off.
Q: I am at Houston and sent me an email at 3/26/2006 5:25 PM and saved it as MSG. It displays at XP...
Author: atsim1 Date: 02/28/2007
Besides my PC, are there other things I need to worry about on my computer network?
Q: Besides my PC, are there other things I need to worry about on my computer network? Are routers,...
Author: atsim1 Date: 02/28/2007
Info on the OS patch working or not working with Excel 2007 time and date functions
Q: where should I go to get info on the OS patch working or not working with Excel 2007 time and...
Author: atsim1 Date: 02/28/2007
Timestamps and Office 2007 with Vista: does it also have a problem with historical data?
Q: What about timestamps and Office 2007 with Vista: does it also have a problem with historical...
Author: atsim1 Date: 02/28/2007
Explain How Windows Explorer uses DST for file datetime
Q: Could you explain How Windows Explorer uses DST for file datetime? A: Timestamps are values that...
Author: atsim1 Date: 02/28/2007
For this daylight saving change, do I just adjust my clock in the control panel?
Q: For this daylight saving change, do I just adjust my clock in the control panel? Or do I have to...
Author: atsim1 Date: 02/28/2007
I change the setting “Automatically adjust for clock for daylight saving time changes” at the dialog box Date and Time Properties”, the modified datetime does not change
Q: When I change the setting “Automatically adjust for clock for daylight saving time changes” at...
Author: atsim1 Date: 02/28/2007
Quick Reference for various scenarios when rebasing appointments for DST 2007 issues
The following applies to hotfix package for the Time Zone Data Update tool for Microsoft Office...
Author: atsim1 Date: 02/28/2007
Quick Reference
The following provides a quick reference for various scenarios when rebasing appointments for DST...
Author: atsim1 Date: 02/28/2007