How to configure daylight saving time for the United States and Canada in 2007 and in subsequent years on Windows Mobile-based devices (923953)


The information in this article applies to:

  • Microsoft Windows Mobile 2003 for Pocket PC
  • Microsoft Windows Mobile 2003 for Smartphone
  • Microsoft Windows Mobile 2003 software for Pocket PC
  • Microsoft Windows Mobile 2003 software for Smartphone
  • Microsoft Windows Mobile 2003 Second Edition software for Pocket PC
  • Microsoft Windows Mobile 2003 Second Edition software for Smartphone
  • Microsoft Windows Mobile 5.0 software for Pocket PCs
  • Microsoft Windows Mobile 5.0 software for Pocket PCs Phone Edition
  • Microsoft Windows Mobile 5.0 software for Smartphone
Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry

Disclaimer The information in this article may change based on the results of the Energy Policy Act. This article will be updated as needed. Customers who want to update the time zone by using registry files must fully test the solution before deployment. This article only applies to Microsoft Windows Mobile-based devices.
For a Microsoft Windows CE version of this article, see 923027.

INTRODUCTION

Because of the Energy Policy Act, daylight saving time is extended by four weeks in 2007. This change affects the following time zones:
  • GMT-3:30 Newfoundland
  • GMT-4 Atlantic
  • GMT-5 Eastern US
  • GMT-6 Central US
  • GMT-7 Mountain US
  • GMT-8 Pacific US
  • GMT-9 Alaska
The 2006 daylight saving time implementation is as follows:
  • Daylight saving time starts at 02:00 A.M. on April 2, 2006.
  • Daylight saving time ends at 02:00 A.M. on October 29, 2006.
The 2007 daylight saving time implementation is as follows:
  • Daylight saving time starts at 02:00 A.M. on March 11, 2007.
  • Daylight saving time ends at 02:00 A.M. on November 4, 2007.
Clocks change at 02:00 A.M. local time. On March 11, 2007, clocks will move forward one hour from 01:59 A.M. to 03:00 A.M. On November 4, 2007, clocks will move back one hour from 01:59 A.M. to 01:00 A.M.

You can use the following rules to determine the start date and end date for daylight saving time in subsequent years:
  • Daylight saving time starts on the second Sunday in March.
  • Daylight saving time ends on the first Sunday in November.
  • The previous changes occur at 02:00 A.M. local time.

MORE INFORMATION

Warning 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.

Use the following changes to make sure that Windows Mobile-based devices display daylight saving time correctly in 2007 and in subsequent years.

Important The following changes modify the registry and could make a Windows Mobile-based device unstable if these changes are applied incorrectly. End-users should check whether this update is available from the device manufacturer.

Updated registry key information for the .inf file

The following listing shows .inf file data that contains updated registry key information for Windows Mobile-based devices. OEM device manufacturers can use the following listing to create an .inf file that is contained in a .cab file. The .cab file can then be installed in Windows Mobile-based devices.
[Version]
Signature="$Windows NT$"
Provider="Microsoft"
CESignature="$Windows CE$"

[DefaultInstall]
AddReg = RegSettings.All

[SourceDisksNames]
1 = ,"Common Files", , .\

[SourceDisksFiles]
readme.htm = 1

[DestinationDirs]
Files.Common = 0, %CE3%
DefaultDestDir = 0,%InstallDir%

[CEStrings]
AppName = update for United States Timezones of 2007
InstallDir = %CE3%

[Files.Common]
readme.htm,,,0

[RegSettings.All]
HKLM,SOFTWARE\Microsoft\Timezones\60, TZI, 0x00000001, d2,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0b,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,00,00,02,00,02,00,00,00,00,00,00,00
HKLM,SOFTWARE\Microsoft\Timezones\60, Display, 0x00000000, GMT-3:30 Newfoundland

HKLM,SOFTWARE\Microsoft\Timezones\50, TZI, 0x00000001, f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0b,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,00,00,02,00,02,00,00,00,00,00,00,00
HKLM,SOFTWARE\Microsoft\Timezones\50, Display, 0x00000000, GMT-4 Atlantic

HKLM,SOFTWARE\Microsoft\Timezones\35, TZI, 0x00000001, 2c,01,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0b,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,00,00,02,00,02,00,00,00,00,00,00,00
HKLM,SOFTWARE\Microsoft\Timezones\35, Display, 0x00000000, GMT-5 Eastern US

HKLM,SOFTWARE\Microsoft\Timezones\20, TZI, 0x00000001, 68,01,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0b,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,00,00,02,00,02,00,00,00,00,00,00,00
HKLM,SOFTWARE\Microsoft\Timezones\20, Display, 0x00000000, GMT-6 Central US

HKLM,SOFTWARE\Microsoft\Timezones\10, TZI, 0x00000001, a4,01,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0b,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,00,00,02,00,02,00,00,00,00,00,00,00
HKLM,SOFTWARE\Microsoft\Timezones\10, Display, 0x00000000, GMT-7 Mountain US

HKLM,SOFTWARE\Microsoft\Timezones\4, TZI, 0x00000001, e0,01,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,00,00,02,00,02,00,00,00,00,00,00,00
HKLM,SOFTWARE\Microsoft\Timezones\4, Display, 0x00000000, GMT-8 Pacific US

HKLM,SOFTWARE\Microsoft\Timezones\3, TZI, 0x00000001, 1c,02,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0b,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,00,00,02,00,02,00,00,00,00,00,00,00
HKLM,SOFTWARE\Microsoft\Timezones\3, Display, 0x00000000, GMT-9 Alaska

REFERENCES

For more information about daylight saving time changes in the United States in 2007, visit the following Microsoft Web site:

http://www.microsoft.com/windows/timezone/dst2007.mspx

Modification Type:MajorLast Reviewed:8/18/2006
Keywords:kbhowto kbinfo KB923953 kbAudDeveloper kbAudEndUser kbAudOEM
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