How to configure the daylight saving time start date and end date for Guatemala in Windows

On April 30, 2006

1. Click Start, click Run, type timedate.cpl in the Open box, and then click OK.

2. Click the Time Zone tab, click (GMT-05:00) Bogota, Lima, Quito in the Time Zone list, and then click OK.

On October 1, 2006

1. Click Start, click Run, type timedate.cpl in the Open box, and then click OK.

2. Click the Time Zone tab, click (GMT-06:00) Central America in the Time Zone list, and then click OK.

The Windows Time Zone Editor tool (Tzedit.exe)

For corporate users and industry personal computer users who do not require calendar synchronization with users who are located outside Guatemala, we recommend the Windows Time Zone Editor (Tzedit.exe) tool to modify the daylight saving time start date and daylight saving time end date in your time zone. The Windows Time Zone Editor tool is included in the Windows 2000 Server Resource Kit Tools.

To modify the time zone settings by using this tool, follow these steps.

Step 1: Configure the daylight saving time start date and end date

Use the Windows Time Zone Editor tool to modify the time zone settings on one computer or on several computers. To do this, follow these steps:

1. On a computer that has the Windows 2000 Server Resource Kit Tools installed, click Start, click Run, type tzedit in the Open box, and then click OK.

2. In the Windows Time Zone Editor dialog box, click (GMT-06:00) Central America in the Time Zones list, and then click Edit.

3. In the Edit Time Zone dialog box, click to select the Automatically set Daylight Saving Time check box.

4. In the Start Day box, click Last, click Sunday, and then click April.

5. Leave the default time setting of 12:00:00 AM selected.

6. In the Last Day box, click First, click Sunday, and then click October.

7. Leave the default time setting of 12:00:00 AM selected.

8. In the Daylight Bias box, leave the default setting of +1:00 selected to force the computer clock to move forward by one hour during daylight saving time.

9. Click OK, and then click Close to close the Windows Time Zone Editor tool.

10. Click Start, click Run, type timedate.cpl in the Open box, and then click OK.

11. Click the Time Zone tab, click a time zone other than (GMT-06:00) Central America in the Time Zone list, and then click Apply.

12. In the Time Zone list, click (GMT-06:00) Central America, and then click OK.
    
    Note You must perform steps 11 and 12 to force the new time zone settings to take effect.

Step 2: Export the time zone registry settings to other computersWarning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk. If you have to modify the time zone settings on many computers, export the registry information from the computer that you modified in the "Step 1: Configure the daylight saving time start date and end date" section. You can then use the .reg file that you exported to update the time zone information on other computers. To do this, follow these steps.

Note Before you deploy the time zone registry information to other computers in your organization, we recommend that you verify whether the time is updated correctly on the computer that you modified in the "Step 1: Configure the daylight saving time start date and end date" section.

1. On the computer on which you modified the time zone information in the "Step 1: Configure the daylight saving time start date and end date" section, click Start, click Run, type regedit, and then click OK.

2. In Registry Editor, follow these steps, depending on the operating system that you are running:

   • If you are running Microsoft Windows XP, Microsoft Windows 2000, or Microsoft Windows Server 2003, locate and then click the following registry key:
     

     HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Central America Standard Time

   • If you are running Microsoft Windows 98, Windows 98 Second Edition, or Microsoft Windows Millennium Edition (Me), locate and then click the following registry subkey:
     

     HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Time Zones\Central America

3. On the Registry menu, click Export Registry File. Or, on the File menu, click Export.

4. In the Export Registry File dialog box, click the folder to which you want to export the .reg file, type timezones in the File name box, and then click Save.

5. Locate and then click the following registry key:
   

   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation

6. On the Registry menu, click Export Registry File. Or, on the File menu, click Export.

7. In the Export Registry File dialog box, click the folder to which you want to export the .reg file, type tzinfo in the File name box, and then click Save.

8. Exit Registry Editor.

9. Copy the Timezones.reg and Tzinfo.reg files that you created in step 4 and step 7 to the computers on which you want to update the time zone settings.

10. On each destination computer, run the Timezones.reg and Tzinfo.reg files to enter the time zone information into the registry.

11. After the registry information has been successfully entered in the registry of each destination computer, restart each destination computer.

The Daylight Saving Time Update Utility (Timezone.exe)

The Daylight Saving Time Update Utility is included with the Windows Resource Kit Tools for the particular version of Windows that you are running. To obtain the Microsoft Windows Server 2003 Resource Kit Tools, visit the following Microsoft Web site:

http://www.microsoft.com/download/details.aspx?FamilyID=9d467a69-57ff-4ae7-96ee-b18c4790cffd&displaylang=enThe Daylight Saving Time Update Utility is a command-line tool that you can use to update the daylight saving time start date and end date for the current time zone in the registry.

Note This tool updates daylight saving time information only for the current time zone. This time zone information is stored in the following registry subkey:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformationThis tool does not change the default definition of the time zone that is stored in the following registry subkeys:

• In Windows XP, Windows 2000, or Windows Server 2003:
  

  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones

• In Windows 98, Windows 98 Second Edition, or Windows Millennium Edition:
  

  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Time Zones

Therefore, if you change the time zone by using the Date and Time item in Control Panel at some later date, the daylight saving time start and end dates for the time zone that you modified are reset to the default values.

For more information about how to run the Daylight Saving Time Update Utility, see the Timezone.exe topic in Windows Resource Kit Tools Help. To view this topic on a Windows Server 2003-based computer on which the Resource Kits Tools are installed, follow these steps:

1. Click Start, point to All Programs, point to Windows Resource Kit Tools, and then click Windows Resource Kit Tools Help.

2. In the Help and Support Center dialog box that appears, expand Windows Resource Kit Tools, expand Alphabetical List of Tools, and then click Timezone.exe: Daylight Saving Time Update Utility.