Admin Tips
- Windows Server 2008/2003/2000/XP/NT Administrator Knowledge Base
  - Windows NT
    - Registry Tips
      - Miscellaneous
        Registry Tip : Daylight Savings Time

Section(s): Miscellaneous
Published on Apr 20, 2004.
Last Modified on Apr 20, 2004.
Last Modified by Wayne Maples.
Rated 4 out of 5 based on 5 votes.

If you want to disable the automatic adjustment for daylight savings time, use the Control Panel, Date/Time icon, Time Zone tab, and unclick check box Automatically adjust for daylight savings changes. If unchecked, you will find:

Hive: HKEY_LOCAL_MACHINE
Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation
Name: DisableAutoDaylightTimeSet
Type: REG_DWORD
Value: 0x1