Article ID: 320034
Article Last Modified on 12/1/2007
APPLIES TO
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Professional Edition
- Microsoft Windows 2000 Datacenter Server
- Microsoft Windows XP Home Edition
- Microsoft Windows XP Professional
- Microsoft Windows XP Professional x64 Edition
- Microsoft Windows NT Server 4.0 Standard Edition
- Microsoft Windows NT Workstation 4.0 Developer Edition
- Microsoft Windows Millennium Edition
- Microsoft Windows 98 Second Edition
- Microsoft Windows 98 Standard Edition
- Microsoft Windows 95
- Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
- Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
- Microsoft Windows Server 2003, Standard Edition (32-bit x86)
- Microsoft Windows Server 2003, Web Edition
- Microsoft Windows Server 2003, 64-Bit Datacenter Edition
- Microsoft Windows Server 2003, Enterprise x64 Edition
This article was previously published under Q320034
SUMMARY
The Mexico City time zone is being modified in 2002 to change the way that daylight saving time is implemented. The 2001 implementation is as follows:
- Daylight saving time begins at 2:00 A.M. on the first Sunday of May.
- Daylight saving time ends at 2:00 A.M. on the last Sunday of September.
The 2002 implementation is as follows:
- Daylight saving time begins at 2:00 A.M. on the first Sunday of April.
- Daylight saving time ends at 2:00 A.M. on the last Sunday of October.
This article describes methods that you can use to modify the default behavior of this time zone in Microsoft Windows to reflect this change.
MORE INFORMATION
You can use several methods to modify the default behavior of a time zone in Windows. For example, you can modify the behavior manually, or you can run a command in an unattended rollout.
Modify the time zone manually
To modify the time zone manually, use one of the following methods:
- Use the Tzedit.exe utility to adjust the start and the end dates for daylight saving time in the time zone. You can obtain the Tzedit.exe utility from any Microsoft Windows Resource Kit. For more information about how to use Tzedit.exe, click the following article number to view the article in the Microsoft Knowledge Base:
158195 Time Zone Editor Available on OEM Service Release 2 CD-ROM
- Create an .inf file to modify the time zone. After you create the .inf file, right-click the file, and then click Install. Sample .inf file entries are listed at the end of this article.
Use an automated deployment
To deploy new time zone settings automatically, create an .inf file to modify the time zone, and then use the Rundll32.exe utility to implement the .inf file. The following command is an example of the rundll32 command (where path\file_name is the location of the .inf file):
rundll32 setupapi,InstallHinfSection DefaultInstall 128 path\file_name
Sample .inf file entries
Windows XP
This is sample .inf file text for Windows XP:
[Version]
Signature = "$Windows NT$"
[DefaultInstall]
AddReg = AddReg
[AddReg]
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time","Display",0x00000002,"(GMT-06:00) Guadalajara, Mexico City, Monterrey"
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time","Dlt",0x00000002,"Mexico Daylight Time"
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time","Std",0x00000002,"Mexico Standard Time"
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time","MapID",0x00000002,"-1,85"
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time","Index",0x00010001,30
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time","TZI",0x00030001,68,01,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0A,00,00,00,05,00,02,00,00,00,00,00,00,00,00,00,04,00,00,00,01,00,02,00,00,00,00,00,00,00
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time 2","Display",0x00000002,"(GMT-07:00) Chihuahua, La Paz, Mazatlan"
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time 2","Dlt",0x00000002,"Mexico Daylight Time"
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time 2","Std",0x00000002,"Mexico Standard Time 2"
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time 2","MapID",0x00000002,"34,35"
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time 2","Index",0x00010001,13
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time 2","TZI",0x00030001,A4,01,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0A,00,00,00,05,00,02,00,00,00,00,00,00,00,00,00,04,00,00,00,01,00,02,00,00,00,00,00,00,00
NOTE: If the computers are already at the time zone that is mentioned earlier, you must also add the following lines at the end of the script so that the changes of this time zone take effect. Append this text in the sample .inf file text for Windows NT, Windows 2000, and Windows XP (Guadalajara, Mexico City, Monterrey only).
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","ActiveTimeBias",0x00010001,300
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","Bias",0x00010001,360
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","DaylightBias",0x00010001,0xffffffc4
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","DaylightName",0x00000002,"Mexico Daylight Time"
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","DaylightStart",0x00030001,00,00,04,00,01,00,02,00,00,00,00,00,00,00,00,00
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","StandardBias",0x00010001,0
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","StandardName",0x00000002,"Mexico Standard Time"
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","StandardStart",0x00030001,00,00,0a,00,05,00,02,00,00,00,00,00,00,00,00,00
Append the following text in the sample .inf file text for Windows XP (Chihuahua, La Paz, Mazatlan only):
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","ActiveTimeBias",0x00010001,360
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","Bias",0x00010001,420
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","DaylightBias",0x00010001,0xffffffc4
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","DaylightName",0x00000002,"Mexico Daylight Time"
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","DaylightStart",0x00030001,00,00,04,00,01,00,02,00,00,00,00,00,00,00,00,00
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","StandardBias",0x00010001,0
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","StandardName",0x00000002,"Mexico Standard Time 2"
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","StandardStart",0x00030001,00,00,0a,00,05,00,02,00,00,00,00,00,00,00,00,00
Windows 2000 and Windows NT
This is sample .inf file text for Windows 2000 and Windows NT:
[Version]
Signature = "$Windows NT$"
[DefaultInstall]
AddReg = AddReg
[AddReg]
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time","Display",0x00000002,"(GMT-06:00) Mexico City"
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time","Dlt",0x00000002,"Mexico Daylight Time"
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time","Std",0x00000002,"Mexico Standard Time"
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time","MapID",0x00000002,"-1,85"
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time","Index",0x00010001,30
HKLM,"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Mexico Standard Time","TZI",0x00030001,68,01,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0A,00,00,00,05,00,02,00,00,00,00,00,00,00,00,00,04,00,00,00,01,00,02,00,00,00,00,00,00,00
NOTE: If the computers are already at the time zone that is mentioned earlier, you must also add the following lines at the end of the script so that the changes of this time zone take effect. Append the following text in the sample .inf file text for Windows NT and Windows 2000 (Guadalajara, Mexico City, Monterrey only).
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","ActiveTimeBias",0x00010001,300
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","Bias",0x00010001,360
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","DaylightBias",0x00010001,0xffffffc4
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","DaylightName",0x00000002,"Mexico Daylight Time"
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","DaylightStart",0x00030001,00,00,04,00,01,00,02,00,00,00,00,00,00,00,00,00
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","StandardBias",0x00010001,0
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","StandardName",0x00000002,"Mexico Standard Time"
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","StandardStart",0x00030001,00,00,0a,00,05,00,02,00,00,00,00,00,00,00,00,00
Windows 95, Windows 98, and Windows Millennium Edition
This is sample .inf file text for Windows 95, Windows 98, and Windows Millennium Edition (Me):
[Version]
Signature = "$Chicago$"
[DefaultInstall]
AddReg = AddReg
[AddReg]
HKLM,"SOFTWARE\Microsoft\Windows\CurrentVersion\Time Zones\Mexico","Display",0x00000002,"(GMT-06:00) Mexico City"
HKLM,"SOFTWARE\Microsoft\Windows\CurrentVersion\Time Zones\Mexico","Dlt",0x00000002,"Mexico Daylight Time"
HKLM,"SOFTWARE\Microsoft\Windows\CurrentVersion\Time Zones\Mexico","Std",0x00000002,"Mexico Standard Time"
HKLM,"SOFTWARE\Microsoft\Windows\CurrentVersion\Time Zones\Mexico","MapID",0x00000002,"-1,85"
HKLM,"SOFTWARE\Microsoft\Windows\CurrentVersion\Time Zones\Mexico","Index",0x00010001,30
HKLM,"SOFTWARE\Microsoft\Windows\CurrentVersion\Time Zones\Mexico","TZI",0x00030001,68,01,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0A,00,00,00,05,00,02,00,00,00,00,00,00,00,00,00,04,00,00,00,01,00,02,00,00,00,00,00,00,00
NOTE If the computers are already at the time zone that is mentioned earlier, you must also add the following lines at the end of the script so that the changes of this time zone take effect. Append the following text in the sample .inf file text for Windows 95, Windows 98, and Windows Millennium Edition:
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","ActiveTimeBias",0x00030001,68,01,00,00
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","Bias",0x00030001,68,01,00,00
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","DaylightBias",0x00030001,c4,ff,ff,ff
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","DaylightFlag",0x00030001,01,00,00,00
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","DaylightName",0x00000002,"Mexico Daylight Time"
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","DaylightStart",0x00030001,00,00,04,00,00,00,01,00,02,00,00,00,00,00,00,00
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","StandardBias",0x00030001,00,00,00,00
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","StandardName",0x00000002,"Mexico Standard Time"
HKLM,"SYSTEM\CurrentControlSet\Control\TimeZoneInformation","StandardStart",0x00030001,00,00,0a,00,00,00,05,00,02,00,00,00,00,00,00,00
Additional query words: daylight saving time DST
Keywords: kbinfo KB320034
