Paraguay has announced changes to its Daylight Saving Time (DST) schedule. This hotfix updates the DST start and end dates for the “(UTC-04:00) Asuncion” time zone.

Fiji has announced changes to its DST schedule. This hotfix updates the DST start and end dates for the “(UTC+12:00) Fiji” time zone.

Chile has announced an extension to its DST end date for 2010. This hotfix updates the DST end date for the “(UTC-04:00) Santiago” time zone.

More specifically, this hotfix sets DST as follows:

• Sets DST start date for Paraguay at first Saturday of October at 23:59:59.999 and DST end date at second Saturday of April at 23:59:59.999
• Sets DST start date for Fiji at fourth Sunday of October 2010 at 02:00:00.000 and DST end date at last Sunday of March 2010 at 03:00:00.000
• Sets DST end date for Chile at first Saturday of April, 2010 at 23:59:59.999

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Important Notes:

• For more information about the previous February 2010 DST cumulative update 979306, click the following article number to view the article in the Microsoft Knowledge Base:
  979306  (http://kbalertz.com/Feedback.aspx?kbNumber=979306/ ) February 2010 cumulative time zone update for Microsoft Windows operating systems
• If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
  http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
• The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must be running one of the following operating systems:

• Windows 7
• Windows Server 2008 R2
• Windows Server 2008
• Windows Server 2008 Service Pack 1
• Windows Server 2008 Service Pack 2
• Windows Server 2003 Service Pack 2
• Windows Vista
• Windows Vista Service Pack 1
• Windows Vista Service Pack 2
• Windows XP Service Pack 2
• Windows XP Service Pack 3

Restart requirement

You may need to restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix supersedes DST update KB 979306.

Registry information

To use this hotfix, you do not have to make any changes to the registry.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows XP and Windows Server 2003 file information

For all supported x86-based versions of Windows XP

For all supported x64-based versions of Windows Server 2003 and of Windows XP Professional x64 edition

For all supported x86-based versions of Windows Server 2003

For all supported IA64-based versions of Windows Server 2003

Windows Vista and Windows Server 2008 file information

For all supported x86-based versions of Windows Vista and Windows Server 2008

For all supported x64-based versions of Windows Vista and Windows Server 2008

For all supported IA64-based versions of Windows Vista and Windows Server 2008

Windows 7 and Windows Server 2008 R2 file information

For all supported x86-based versions of Windows 7

For all supported x64-based versions of Windows 7

For all supported IA64-based versions of Windows 7