We have updated our Network Administrator product – You can use it to deploy the patch, and verify it’s installation on machines across your network. Also we have updated the free patch More info about it here
Update 10/25/2009: We have updated our patch again. Both the patch, and Network Administrator have been updated with the latest
Update 2/12/2007 12:57 AM EST – We created a different patch for Windows 98/ME. Visit here for more information
Update 2/12/2007 12:56 AM EST – We want to also remind you that Outlook, Exchange and Java have their own issues. This patch will not fix that. Please see these links for more info on fixing those issues:
See this article for Exchange, and Outlook
http://www.microsoft.com/windows/timezone/dst2007.mspx
For Java:
http://java.sun.com/developer/technicalArticles/Intl/USDST/
Update for 2009:
We have updated our free DST patch for Windows NT, 2000, 2003 and XP. You don’t need it for Vista, 2008, or Windows 7 since Microsoft still supports those operating systems
For Windows XP, you only need it if you don’t want to be forced to upgrade to the latest service pack, and 2000 and NT, you need it if you want your time to be right. There were a few changes across the world since last year, so we have released an update

You can download the free application from here:
You can use Network Administrator to deploy it across your network, since it has the updated settings too:

You can download it from here:
Network Administrator Download
Post from 2007 Continues below:
You may have forgotten by now, but two years ago the US government changed the dates for daylight saving time. When the law was passed it was set to take effect in 2007.
Well, here we are. It is 2007, and Microsoft has published updates for XP, and 2003. But…No update for 2000 Workstation, or any of the server editions.
This is a huge problem for many organizations. I know some companies that have hundreds of Windows 2000 boxes. The thought that they will need to upgrade to XP or 2003 (Just for this) is a nightmare. Microsoft is providing a hotfix – but only to the companies that have an extended support contract. To their credit, Microsoft does provide a registry workaround for the rest of us.
The workaround that Microsoft provides is not easy to follow. Check out the KB article at Microsoft.
We have created a utility that will update any machine to the new daylight saving format (XP, NT, 2000, 2003, Vista). Obviously you only need it for 2000, or NT since those operating systems have dropped off support.
It updates Daylight Saving Time (Yes it is Saving, not Savings) in these time zones:
-Alaska Standard Time Zone
-Central Standard Time Zone
-Eastern Standard Time Zone
-Mountain Standard Time Zone
-Pacific Standard Time Zone
-Atlantic Standard Time Zone (Canada)
-Newfoundland Standard Time Zone (Canada)
If we are missing another US timezone that supports daylight saving time, please let us know by emailing support@intelliadmin.com
The utility can install, or uninstall the change. It runs without any setup and requires no extra DLLs or runtime. It is less than 1mb, so you can put it on a flash drive:

It can run silently from the command line if you use these options:
Install:
DaylightSavingFix.exe /qinstall
UnInstall:
DaylightSavingFix.exe /quninstall
Please note that the program must be run as administrator since it access HKEY_LOCAL_MACHINE
If you want to roll it out to multiple machines we have updated our Network Administrator product to install the patch.

Both can be downloaded from our downloads section

Hi, I get “daylightsavingfix.exe is not a valid Windows NT application” under NT4 server SP6. Is there an issue? Can you tell me what the Oct 2009 patch changed? We are seeing “localtime” issues under nt4 not seen on the previous rollback from DST. Thanks
Mike
I would try to download it again. That usually happens if half the file is missing. It should work fine on NT 4
Hi, The md5 is 3db885fc509a98e4b1e7d903fa4b69f5. It executes in Vista but I get that error under NT4.
OK. We will take a look. Possibly our compiler is setting a switch that does not allow NT 4 execution